| George Clooney | .... | Danny Ocean |
| CeCeLia Birt | .... | Board Member #1 (Stimme) |
| Paul L. Nolan | .... | Board Member #2 (Stimme) |
| Carol Florence | .... | Board Member #3 (Stimme) |
| Lori Galinski | .... | Blackjack Dealer |
| Bernie Mac | .... | Frank Catton |
| Brad Pitt | .... | Rusty Ryan |
| Mark Gantt | .... | Bartender |
| Timothy Paul Perez | .... | Security Guard |
| Elliott Gould | .... | Reuben Tishkoff |
| Frank Patton | .... | Lockbox Carrier |
| Casey Affleck | .... | Virgil Malloy |
| Scott Caan | .... | Turk Malloy |
| Eddie Jemison | .... | Livingston Dell |
| Jorge R. Hernandez | .... | FBI Man #1 |
| Tim Snay | .... | FBI Man #2 |
| Miguel Perez | .... | Explosives Cop |
| Shaobo Qin | .... | Yen |
| Carl Reiner | .... | Saul Bloom |
| Lennox Lewis | .... | Boxing Opponent |
| Wladimir Klitschko | .... | Boxing Opponent |
| Matt Damon | .... | Linus Caldwell |
| Barry Brandt | .... | Technician #1 |
| William Patrick Johnson | .... | Technician #2 |
| Robert Peters | .... | Eye-in-the-Sky Technician #1 |
| David Jensen | .... | Eye-in-the-Sky Technician #2 |
| Kelly Adkins | .... | Dancer |
| Gregory Stenson | .... | Sentry |
| Joe LaDue | .... | Billy Tim Denham |
| Andy Garcia | .... | Terry Benedict |
| John C. Fiore | .... | Hotel Security |
| Tommy Kordick | .... | Hotel Security |
| Michael DeLano | .... | Casino Manager ("Walsh") |
| Charles La Russa | .... | Italian High Roller |
| Anthony Allison | .... | French High Roller |
| Ronn Soeda | .... | Japanese High Roller |
| Julia Roberts | .... | Tess Ocean |
| Robin Sachs | .... | Seller |
| J. P. Manoux | .... | Aide-de-Camp |
| Jerry Weintraub | .... | High Roller |
| Frankie Jay Allison | .... | High Roller Pit Boss |
| James Curatola | .... | Baccarat Dealer |
| Henry Silva | .... | Boxing Spectator |
| Eydie Gorme | .... | Boxing Spectator |
| Angie Dickinson | .... | Boxing Spectator |
| Steve Lawrence | .... | Boxing Spectator |
| Wayne Newton | .... | Boxing Spectator |
| Siegfried Fischbacher | .... | Boxing Spectator |
| Roy Horn | .... | Boxing Spectator |
| Jim Lampley | .... | Boxing Spectator |
| Larry Merchant | .... | Boxing Spectator |
| Richard Reed | .... | Bucky Buchanan |
| David Sontag | .... | Plainclothes Goon #1 |
| Larry Sontag | .... | Plainclothes Goon #2 |
| William Allison | .... | Guard |
| Rusty Meyers | .... | Security Officer #1 |
| Joe Coyle | .... | Security Officer #2 |
| Scott L. Schwartz | .... | Bulldog, the Bruiser |
| Richard Steele | .... | Boxing Referee |
| John Robotham | .... | Uzi-Carrying Guard #1 |
| Vincent M. Ward | .... | Uzi-Carrying Guard #2 |
| Scott Clark Beringer | .... | Head Goon |
| James Alfonso | .... | Police Officer |
| Bonnie Joy Ashley | .... | High Roller (uncredited) |
| Jonathan Burleigh Barnthouse | .... | Wladimir Klitschko's Body Guard (uncredited) |
| Bonnie Bom | .... | Dog Track Gambler (uncredited) |
| Lloyd Booker | .... | DOUBLE / ON SCREEN (uncredited) |
| Christie Campagna | .... | Woman in Casino (uncredited) |
| Derek Sean Carlton | .... | Fight Spectator (uncredited) |
| Adam Carrera | .... | Casino Security Guard (uncredited) |
| Don Cheadle | .... | Basher Tarr (uncredited) |
| Holly Marie Combs | .... | Holly (uncredited) |
| Presley V. Conkle | .... | Extra (uncredited) |
| Christopher Crotty | .... | Security Guard (uncredited) |
| Jeremy Dunn | .... | Dealer (uncredited) |
| Jacob 'Stitch' Duran | .... | Wladimir Klitschko's Cutman (uncredited) |
| LaTisha Fletcher | .... | Casino Patron (uncredited) |
| Patrick Fullerton | .... | Boxing Spectator (uncredited) |
| Jaime Gallagher | .... | Diner (uncredited) |
| Joss Gomez | .... | Casino Dealer (uncredited) |
| Topher Grace | .... | Topher Grace (uncredited) |
| Laurence R. Griffin | .... | Sports Book Patron (uncredited) |
| Charles Halford | .... | Bellagio Security Guard (uncredited) |
| Joshua Jackson | .... | Himself (uncredited) |
| Rick Kain | .... | Casino Patron (uncredited) |
| Matthew Kish | .... | Circus Audience Member (uncredited) |
| Jesse Kozel | .... | Dog Track Gambler (uncredited) |
| David Leitch | .... | Security Guard / X-Bag Man #1 (uncredited) |
| Simone Lotter | .... | Patron at Gaming Table (uncredited) |
| Christopher Mann | .... | Security Guard (uncredited) |
| Michael Mantella | .... | Fight Night Fan #1 (uncredited) |
| Brad Martin | .... | Security Guard / X-Bag Man #3 (uncredited) |
| Mycole Metcalf | .... | Cocktail Waitress (uncredited) |
| George D. Miklos | .... | High Roller (uncredited) |
| Anthony Parrulli | .... | Benedict's Limo Driver (uncredited) |
| Bob Pepper | .... | Pedestrian (uncredited) |
| Gustavo Perez | .... | Gambler (uncredited) |
| Gary Pike | .... | Passerby (uncredited) |
| 'Diamond' Tim Pleshaw | .... | Boxing Fan in the Crowd (uncredited) |
| Troy Robinson | .... | Security Guard (uncredited) |
| David C. Roehm Sr. | .... | Slick Mack (uncredited) |
| Thomas Rosales, jr. | .... | Security Guard at Boxing Fight (uncredited) |
| Laurent Schwaar | .... | Maitre D' (uncredited) |
| Steven Soderbergh | .... | Vault-Bombing Thief (uncredited) |
| Emanuel Steward | .... | Himself (uncredited) |
| Reggi Danielle Sweat | .... | Restaurant Patron (uncredited) |
| Yann Toderi | .... | Man in Bar (uncredited) |
| Barry Watson | .... | Himself (uncredited) |
| Shane West | .... | Himself (uncredited) |
| Bernie Yuman | .... | High Roller Guy (uncredited) |