UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                            Washington, D.C.  20549

                                    Form 13F

                              Form 13F COVER PAGE

Report for the Calendar Year or Quarter Ended: December 31, 2008

Check here if Amendment [  ]; Amendment Number:
This Amendment (Check only one.): [  ] is a restatement.
                                  [  ] adds new holdings entries.

Institutional Investment Manager Filing this Report:

Name:    Fortress Investment Group LLC
Address: 1345 Avenue of the Americas, 46th Flr.
         New York, NY  10105

13F File Number:  28-12421

The institutional investment manager filing this report and the person by whom
it is signed hereby represent that the person signing the report is authorized
to submit it, that all information contained herein is true, correct and
complete, and that it is understood that all required items, statements,
schedules, lists, and tables, are considered integral parts of this form.

Person Signing this Report on Behalf of Reporting Manager:

Name:      David Brooks
Title:     Secretary, VP and General Counsel
Phone:     212-798-6100

Signature, Place, and Date of Signing:

      /s/  David Brooks     New York, NY     February 17, 2009

Report Type (Check only one.):

[ X]         13F HOLDINGS REPORT.

[  ]         13F NOTICE.

[  ]         13F COMBINATION REPORT.



                              FORM 13F SUMMARY PAGE

Report Summary:

Number of Other Included Managers:         13

Form13F Information Table Entry Total:     90

Form13F Information Table Value Total:     $798,053 (thousands)

List of Other Included Managers:

Provide a numbered list of the name(s) and Form 13F file number(s) of all
institutional managers with respect to which this report is filed, other
than the manager filing this report.

No.  13F File Number               Name

1    28-12421                      Fortress Investment Group LLC
2    28-12417                      FIG Corp
3    28-12418                      Fortress Operating Entity I LP
4    28-10806                      FIG LLC
5    28-10807                      Drawbridge Global Macro Advisors LLC
6    28-11237                      Drawbridge Special Opportunities Advisors LLC
7    28-11538                      Fortress Fund MM LLC
8    28-11537                      Fortress Fund MM II LLC
9    28-10162                      FIG Advisors LLC
10   28-12420                      RIC Coinvestment Fund GP LLC
11   28-12416                      Fortress Investment Fund GP Holdings LLC
12   28-12512                      Fortress Fund III GP LLC
13   28-12439                      Fortress Operating Entity II LP
14   28-13249                      Fortress Commodities Advisors LLC



                                    
                                                     FORM 13F INFORMATION TABLE
                                                             VALUE  SHARES/ SH/ PUT/ INVSTMT  OTHER            VOTING AUTHORITY
NAME OF ISSUER                 TITLE OF CLASS   CUSIP     (x$1000)  PRN AMT PRN CALL DSCRETN MANAGERS         SOLE   SHARED     NONE
------------------------------ ---------------- --------- -------- -------- --- ---- ------- ------------ -------- -------- --------
ADVANCED TECHNOLOGY ACQU COR   *W EXP 06/18/201 007556111       37  1856250 SH       DEFINED 1 2 3 4 6     1856250        0        0
ADVANCED TECHNOLOGY ACQU COR   COM              007556103    13903  1856250 SH       DEFINED 1 2 3 4 6     1856250        0        0
AIRCASTLE LTD                  COM              G0129K104   103966 21750002 SH       DEFINED 1 2 11 12 13 21750002        0        0
AIRCASTLE LTD                  COM              G0129K104    17328  3625000 SH       DEFINED 1 2 3 4 5     3625000        0        0
AIRCASTLE LTD                  COM              G0129K104    20008  4185875 SH       DEFINED 1 2 3 4 6     4185875        0        0
ALCOA INC                      COM              013817101    11260  1000000 SH  CALL DEFINED 1 2 3 4 14          0        0        0
ALTERNATIVE ASSET MGMT ACQU    *W EXP 08/01/201 02149U119      109  1210250 SH       DEFINED 1 2 3 4 6     1210250        0        0
ALTERNATIVE ASSET MGMT ACQU    COM              02149U101    10629  1150300 SH       DEFINED 1 2 3 4 6     1150300        0        0
ANGLOGOLD ASHANTI LTD          SPONSORED ADR    035128206     2891   104334 SH       DEFINED 1 2 3 4 6      104334        0        0
ASIA SPECIAL SIT ACQST CORP    SHS              G0538M105     5889   650000 SH       DEFINED 1 2 3 4 6      650000        0        0
BROOKDALE SR LIVING INC        COM              112463104    98213 17600867 SH       DEFINED 1 2 10 13    17600867        0        0
BROOKDALE SR LIVING INC        COM              112463104   185412 33228000 SH       DEFINED 1 2 3 4  8 9 33228000        0        0
BROOKDALE SR LIVING INC        COM              112463104      698   125000 SH       DEFINED 1 2 3 4 6      125000        0        0
BROOKDALE SR LIVING INC        COM              112463104    55404  9929000 SH       DEFINED 1 2 3 4 7 9   9929000        0        0
CAPITOL ACQUISITION CORP DEL   *W EXP 11/08/201 14055E112       98   750000 SH       DEFINED 1 2 3 4 6      750000        0        0
CHINA HLDGS ACQUISITION CORP   *W EXP 11/16/201 16942N114       10   990000 SH       DEFINED 1 2 3 4 6      990000        0        0
CHINA HLDGS ACQUISITION CORP   COM              16942N106     8811   990000 SH       DEFINED 1 2 3 4 6      990000        0        0
COLUMBUS ACQUISITION CORP      *W EXP 05/18/201 198851115        2    72700 SH       DEFINED 1 2 3 4 6       72700        0        0
COLUMBUS ACQUISITION CORP      COM              198851107     2280   300000 SH       DEFINED 1 2 3 4 6      300000        0        0
DANA HOLDING CORP              COM              235825205     1886  1401471 SH       DEFINED 1 2 3 4 6     1401471        0        0
DIAMOND OFFSHORE DRILLING IN   COM              25271C102     1826    30975 SH       DEFINED 1 2 13          30975        0        0
ENTERPRISE ACQUISITION CORP    *W EXP 11/07/201 29365R116       16   500000 SH       DEFINED 1 2 3 4 6      500000        0        0
ENTERPRISE ACQUISITION CORP    COM              29365R108     4586   500000 SH       DEFINED 1 2 3 4 6      500000        0        0
GATEHOUSE MEDIA INC            COM              367348109      320  1334011 SH       DEFINED 1 2 3 4 5     1334011        0        0
GATEHOUSE MEDIA INC            COM              367348109       37   725800 SH       DEFINED 1 2 3 4 6      925800        0        0
GATEHOUSE MEDIA INC            COM              367348109      882 22050000 SH       DEFINED 1 2 11 12 13 22050000        0        0
GENERAL ELECTRIC CO            COM              369604103     7452   460000 SH  PUT  DEFINED 1 2 3 4 14     460000        0        0
GENERAL GROWTH PPTYS INC       COM              370021107       40    30900 SH       DEFINED 1 2 13          30900        0        0
GENERAL MTRS CORP              DEB SR CONV B    370442733      172    49945 SH       DEFINED 1 2 3 4 6       49945        0        0
GENESIS LEASE LTD              ADR              37183T107      637   225200 SH       DEFINED 1 2 3 4 6      225200        0        0
GLOBAL BRANDS ACQUISITION CO   *W EXP 12/06/201 378982110       76  1500000 SH       DEFINED 1 2 3 4 6     1500000        0        0
GLOBAL BRANDS ACQUISITION CO   COM              378982102     9090   990200 SH       DEFINED 1 2 3 4 6      990200        0        0
GLOBAL CONSUMER ACQST CORP     COM              378983100     8181   903000 SH       DEFINED 1 2 3 4 6      903000        0        0
GLOBAL CONSUMER ACQST CORP     UNIT 99/99/9999  378983209       46   575500 SH       DEFINED 1 2 3 4 6      575500        0        0
GOLD FIELDS LTD NEW            SPONSORED ADR    38059T106     2006   202000 SH       DEFINED 1 2 3 4 6      202000        0        0
GOLDEN POND HEALTHCARE INC     *W EXP 11/06/201 38116J117       22   750000 SH       DEFINED 1 2 3 4 6      750000        0        0
GOLDEN POND HEALTHCARE INC     COM              38116J109     1808   250000 SH       DEFINED 1 2 3 4 6      250000        0        0
GRAFTECH INTL LTD              COM              384313102     2996   360100 SH       DEFINED 1 2 3 4 6      360100        0        0
HICKS ACQUISITION CO I INC     COM              429086309     5241   574100 SH       DEFINED 1 2 3 4 6      574100        0        0
HIGHLANDS ACQUISITION CORP     COM              430880104     3661   398000 SH       DEFINED 1 2 3 4 6      398000        0        0
IDEATION ACQUISITION CORP      *W EXP 11/19/201 451665111        8   250000 SH       DEFINED 1 2 3 4 6      250000        0        0
IDEATION ACQUISITION CORP      COM              451665103     1622   225000 SH       DEFINED 1 2 3 4 6      225000        0        0
ISHARES TR                     DJ US TELECOMM   464287713      520    31550 SH       DEFINED 1 2 3 4 5       31550        0        0
ISHARES TR                     MSCI EMERG MKT   464287234     8740   350000 SH       DEFINED 1 2 3 4 14     350000        0        0
KBL HEALTHCARE ACQUIS CORP I   *W EXP 07/18/201 48241N115       13   658100 SH       DEFINED 1 2 3 4 6      658100        0        0
KBL HEALTHCARE ACQUIS CORP I   COM              48241N107     4877   658100 SH       DEFINED 1 2 3 4 6      658100        0        0
LIBERTY ACQUISITION HLDGS CO   *W EXP 12/12/201 53015Y115      123   336900 SH       DEFINED 1 2 3 4 6      336900        0        0
LIBERTY ACQUISITION HLDGS CO   COM              53015Y107     5586   673800 SH       DEFINED 1 2 3 4 6      673800        0        0
MBF HEALTHCARE ACQUISITION C   *W EXP 04/16/201 552650111       30   587500 SH       DEFINED 1 2 3 4 6      587500        0        0
MECHEL OAO                     SPONSORED ADR    583840103      700   175000 SH  CALL DEFINED 1 2 3 4 14          0        0        0
MICROSOFT CORP                 COM              594918104      227    11700 SH       DEFINED 1 2 3 4 5       11700        0        0
NAVIOS MARITIME ACQUIS CORP    *W EXP 06/25/201 Y62159119      281  1250000 SH       DEFINED 1 2 3 4 6     1250000        0        0
NAVIOS MARITIME ACQUIS CORP    SHS              Y62159101    10626  1250000 SH       DEFINED 1 2 3 4 6     1250000        0        0
NEWCASTLE INVT CORP            COM              65105M108      862  1025729 SH       DEFINED 1             1025729        0        0
NEWCASTLE INVT CORP            COM              65105M108      161   191600 SH       DEFINED 1 2 3 4 6      191600        0        0
NEWFIELD EXPL CO               COM              651290108     4938   250000 SH  PUT  DEFINED 1 2 3 4 14     250000        0        0
NORTHWESTERN CORP              COM NEW          668074305    19840   845347 SH       DEFINED 1 2 13         845347        0        0
ODYSSEY MARINE EXPLORATION I   COM              676118102     2628   816031 SH       DEFINED 1 2 3 4 5      816031        0        0
PENN NATL GAMING INC           COM              707569109     3365   157377 SH       DEFINED 1 2 13         157377        0        0
POWERSHS DB US DOLLAR INDEX    DOLL INDX BULL   73936D107      272    11000 SH       DEFINED 1 2 3 4 5       11000        0        0
PROSPECT ACQUISITION CORP      *W EXP 11/14/201 74347T111       64   924800 SH       DEFINED 1 2 3 4 6      924800        0        0
PROSPECT ACQUISITION CORP      COM              74347T103     3402   371800 SH       DEFINED 1 2 3 4 6      371800        0        0
SAPPHIRE INDUSTRIALS CORP      *W EXP 01/17/201 80306T117      166  1000000 SH       DEFINED 1 2 3 4 6     1000000        0        0
SAPPHIRE INDUSTRIALS CORP      COM              80306T109     9150  1000000 SH       DEFINED 1 2 3 4 6     1000000        0        0
SELECT SECTOR SPDR TR          SBI CONS STPLS   81369Y308      533    22314 SH       DEFINED 1 2 3 4 5       22314        0        0
SELECT SECTOR SPDR TR          SBI HEALTHCARE   81369Y209      415    15648 SH       DEFINED 1 2 3 4 5       15648        0        0
SELECT SECTOR SPDR TR          SBI INT-ENERGY   81369Y506      538    11255 SH       DEFINED 1 2 3 4 5       11255        0        0
SELECT SECTOR SPDR TR          SBI INT-TECH     81369Y803      386    25050 SH       DEFINED 1 2 3 4 5       25050        0        0
SMITHFIELD FOODS INC           COM              832248108    22512  1600000 SH  CALL DEFINED 1 2 3 4 14          0        0        0
SPDR SERIES TRUST              S&P HOMEBUILD    78464A888      239    20000 SH  CALL DEFINED 1 2 3 4 5           0        0        0
STONELEIGH PARTNERS ACQUS CO   *W EXP 05/31/201 861923126       16   500000 SH       DEFINED 1 2 3 4 6      500000        0        0
STONELEIGH PARTNERS ACQUS CO   COM              861923100     9730  1247500 SH       DEFINED 1 2 3 4 6     1247500        0        0
TARGA RESOURCES PARTNERS LP    COM UNIT         87611X105     2276   293672 SH       DEFINED 1 2 3 4 6      293672        0        0
TREMISIS ENERGY ACQ CORP II    *W EXP 12/05/201 89472N119       88  1100000 SH       DEFINED 1 2 3 4 6     1100000        0        0
TREMISIS ENERGY ACQ CORP II    COM              89472N101     5917   821800 SH       DEFINED 1 2 3 4 6      821800        0        0
TRIAN ACQUISITION I CORP       *W EXP 01/23/201 89582E116      183   798200 SH       DEFINED 1 2 3 4 6      798200        0        0
TRIAN ACQUISITION I CORP       COM              89582E108    12458  1398200 SH       DEFINED 1 2 3 4 6     1398200        0        0
TRIPLECROWN ACQUISITION CORP   *W EXP 10/22/201 89677G117      176  2501700 SH       DEFINED 1 2 3 4 6     2501700        0        0
TRIPLECROWN ACQUISITION CORP   COM              89677G109    24797  2740000 SH       DEFINED 1 2 3 4 6     2740000        0        0
TRIPLECROWN ACQUISITION CORP   UNIT 07/12/2012  89677G208      522    57800 SH       DEFINED 1 2 3 4 6       57800        0        0
UAL CORP                       COM NEW          902549807     7658   694900 SH       DEFINED 1 2 3 4 14     694900        0        0
UAL CORP                       COM NEW          902549807     3967   360000 SH  CALL DEFINED 1 2 3 4 14          0        0        0
UNITED REFINING ENERGY CORP    *W EXP 12/11/201 911360113      160  1600000 SH       DEFINED 1 2 3 4 6     1600000        0        0
UNITED REFINING ENERGY CORP    COM              911360105    12460  1350000 SH       DEFINED 1 2 3 4 6     1350000        0        0
VICTORY ACQUISITION CORP       *W EXP 04/24/201 92644D118       22   367000 SH       DEFINED 1 2 3 4 6      367000        0        0
VICTORY ACQUISITION CORP       COM              92644D100    14540  1499000 SH       DEFINED 1 2 3 4 6     1499000        0        0
WILLBROS GROUP INC             COM              969199108      384    45350 SH       DEFINED 1 2 13          45350        0        0
WILLIAMS COS INC DEL           COM              969457100      362    25000 SH       DEFINED 1 2 3 4 6       25000        0        0
WILLIAMS COS INC DEL           COM              969457100     5792   400000 SH  CALL DEFINED 1 2 3 4 14          0        0        0
WILLIAMS COS INC DEL           COM              969457100     5792   400000 SH  PUT  DEFINED 1 2 3 4 14     400000        0        0