 | Brad Pitt als Jack Conrad |
 | Margot Robbie als Nellie LaRoy |
 | Diego Calva als Manny Torres |
 | Jean Smart als Elinor St. John |
 | Flea als Bob Levine |
 | Jovan Adepo als Sidney Palmer |
 | J.C. Currais als Truck Driver |
 | Jimmy Ortega als Elephant Wrangler |
 | Hansford Prince als Joe Holiday |
 | Telvin Griffin als Reggie |
 | Olivia Wilde als Ina Conrad |
 | Circus-Szalewski als Driver (Wallach's Party) |
 | Lukas Haas als George Munn |
 | Li Jun Li als Lady Fay Zhu |
 | Kaia Gerber als Starlet |
 | Patrick Fugit als Officer Elwood |
 | Eric Roberts als Robert Roy |
 | Cici Lau als Gho Zhu |
 | Tyler Seiple als Customer at Sam Wong's |
| Zack Newick als P.A. (Early Kinoscope) |
 | Rory Scovel als The Count |
 | Olivia Hamilton als Ruth Adler |
 | P.J. Byrne als Max (Ruth's Assistant Director) |
 | Alexandre Chen als Ruth's D.P. (James Wong Howe) |
 | Bob Clendenin als Otto's A.D. |
 | Miraj Grbić als Extra |
| Johnny Hoops als Extra |
| James Wellington als Extra |
| Carlos Nunez als Tim |
 | Laura Steinel als Abby (Assistant Jack's Tent) |
 | Danny Jolles als Writer (Jack's Tent) |
| James Vincent als Employee (Camera Rental House) |
 | Richard Clarke Larsen als A.C. (Camera Rental House) |
 | Max Minghella als Irving Thalberg |
 | Samara Weaving als Constance Moore |
 | Jeff Garlin als Don Wallach |
| Anthony Burkhalter als Reporter (Small Restaurant) |
 | Terry Walters als Editor (Kinoscope) |
| Trisha Simmons als Woman at Door |
| Ariel Flores als Young Man |
 | Karolina Szymczak als Olga Putti |
 | Sean O'Bryan als Studio Executive (Billy) |
 | David Ury als Fan (Autograph) |
 | Katia Gomez als Nurse at Sanatorium |
 | Vanessa Bednar als Nellie's Mother |
 | Carson Higgins als Lloyd (Sound Mixer) |
| Armando Cosio als Grip Harry (1st Day of Sound) |
 | Frederick Koehler als D.P. Bill (1st Day of Sound) |
| Spencer Morgan als Clapper (1st Day of Sound) |
 | Ric Sarabia als Crew Member (1st Day of Sound) |
| Jim Allen Jackson als Set Medic (1st Day of Sound) |
 | Katherine Waterston als Estelle |
| Yissendy Trinidad als Carmelita |
| Cyrus Hobbi als Football Player |
| Anton Hedayat als Football Player |
| Hayley Huntley als Liz (Pool Party) |
 | John Mariano als Master of Ceremonies |
 | Christopher Allen als Manny's Assistant |
| Arely Vianet als Spanish Language Actress |
 | Jeremy Roberts als Studio Employee (Sidney's House) |
 | Alex Reznik als Kinoscope Executive |
 | Chloe Fineman als Marion Davies |
 | Pat Skipper als William Randolph Hearst |
 | John Kerry als Jonathan Rothschild |
 | Sarah Ramos als Harriet Rothschild |
 | Jennifer Grant als Mildred Yates |
| Julian Lefevre als Waiter |
 | Taylor Nichols als Wealthy Man |
 | Bryan Scott Johnson als Wealthy Mann |
| Kelly Meyer als Wealthy Woman |
| Brenna Power als Wealthy Woman |
| David Abed als Young Studio Executive |
 | Kevin Symons als Guest at Hearst Bungalow |
 | Jonathan Thomson als Guest at Hearst Bungalow |
 | Jim O'Brien als Guest at Hearst Bungalow |
 | Chris Doubek als Guest at Hearst Bungalow |
| Dorian Martin als Production Assistant |
 | Todd Giebenhain als Prop Master (Kinoscope) |
 | Mather Zickel als Distribution Executive |
| Ireland Sexton als Thalberg's Secretary |
 | Andrew Hawtrey als Kinoscope Assistant Director |
| Mike Fletcher als Guard (Kinoscope) |
 | Jonathan Ohye als New MGM Assistant Director |
 | James Crittenden als Harold |
 | Pete Ploszek als Young Actor (Jack's Beach Set) |
| Robert Beitzel als Lewis the Director |
 | Ethan Suplee als Wilson |
 | Walker Hare als McKay's Associate |
| Douglas Fruchey als Masked Man |
 | Taylor Hill als Rebecca |
 | Marc Platt als Producer |
| Stephen Thomas als Tourism Official |
| Sophia Magaña als Manny's Daughter |
 | Karen Bethzabe als Silvia Torres |
 | Oscar Balderrama als Guard at Gate |
| Aurielle Simmons als Ticket Clerk (1952) |
 | Eamon Hunt als Man Shouting in Bad Irish Accent |
 | Kenajuan Bentley als Conductor (Night Club) |
 | John Macey als Kyle |
| Noah Reilly als Bellhop |
| Marcos A. Ferraez als Police Officer |
 | Phoebe Tonkin als Jane Thornton |
 | Troy Metcalf als Orville Pickwick |
 | Albert Hammond Jr. als Guest (Chicken Line) |
| Cutty Cuthbert als Jimmy |
 | Bregje Heinen als Female Guest (Nathalie) |
| Dana Marcolina als Female Guest (Jack Tattoo) |
| Tal Seder als Male Guest (Wallach's) |
 | Robert Morgan als Director (Wallach's Party) |
 | Nana Ghana als Woman in Ostrich Feather Hat |
 | Joe Dallesandro als Charlie / Photographer |
 | E.E. Bell als Wilbur |
| Sol Landerman als Publicity Executive (Wallach's Party) |
 | Karina Fontes als Jen |
 | Spike Jonze als Otto (uncredited) |
 | Freya Parker als Nude Extra (uncredited) |
 | Tobey Maguire als James McKay |
 | Judy Garland als Self (Archival Footage) |
 | Gene Kelly als Self (Archival Footage) |
 | Robert Patrick als Self (Archival Footage) |
 | Lewis Tan als Smoking Man (Uncredited) |
 | Manny Liotta als Sneezing PA |
| Francine Maisler | Casting |
| Tobey Maguire | Executive Producer |
| Mary Zophres | Costume Design |
| Marc Platt | Producer |
| Mildred Iatrou | Supervising Sound Editor |
| Adam Siegel | Executive Producer |
| Paul Sonski | Set Designer |
| Deborah Ricketts | Archival Footage Research |
| Eric Reed | Musician |
| Damien Chazelle | Director |
| Damien Chazelle | Writer |
| Chris Baugh | Location Manager |
| Arjen Tuiten | Prosthetic Makeup Artist |
| Grant Sawyer | Props |
| Nancy Deren | Set Designer |
| Linus Sandgren | Director of Photography |
| Eric Sundahl | Supervising Art Director |
| Ted Kim | Assistant Location Manager |
| Tom Cross | Editor |
| Michael Nouryeh | Visual Effects Editor |
| David Duran | Camera Intern |
| Helen Estabrook | Executive Producer |
| Andy Nelson | Sound Mixer |
| Andy Nelson | Sound Re-Recording Mixer |
| Tobias Poppe | Sound Designer |
| Lori A. Balton | Location Scout |
| Elizabeth Himelstein | Dialect Coach |
| Noelle King | Set Designer |
| Lee Gilmore | Sound Effects Editor |
| Mark Boucher | Set Dressing Manager |
| Ai-Ling Lee | Sound Designer |
| Ai-Ling Lee | Supervising Sound Editor |
| Ai-Ling Lee | Sound Re-Recording Mixer |
| Craig Dollinger | Boom Operator |
| Emma Johnston Burton | Makeup Artist |
| Heba Thorisdottir | Makeup Department Head |
| Luis G. Hoyos | Set Designer |
| Eric Rosenberg | Graphic Designer |
| Michael Nelson | Camera Operator |
| Laura Wolford | Costume Supervisor |
| Alex Sessing | Greensman |
| Aaron Downing | Post Production Producer |
| Tony Bryan | Chief Lighting Technician |
| Dave Muskeni | Electrician |
| Paul Becker | Props |
| Michael Diersing | Construction Coordinator |
| John R. Manocchia | Electrician |
| Heather Elwell | Art Department Coordinator |
| Scott Garfield | Still Photographer |
| Justin Hurwitz | Original Music Composer |
| Samuel J. Tell | Set Decoration Buyer |
| Jason Ruder | Supervising Music Editor |
| Elia P. Popov | Special Effects Supervisor |
| Kelly Porter | Key Set Costumer |
| Hope Slepak | Costume Supervisor |
| Thomas Lauifi | Construction Foreman |
| Shawn Kelly | Animation |
| Heath Kraynak | Visual Effects Compositor |
| John M. Levin | Visual Effects |
| Steven Morrow | Sound Mixer |
| Matt Cavanaugh | Sound Effects Editor |
| Sande Alessi | Extras Casting |
| Matthew Plouffe | Producer |
| Jody Felz | Costumer |
| Amber Wakefield | Casting Associate |
| Shane Buttle | Rigging Grip |
| Florencia Martin | Production Design |
| Jim Magdaleno | Storyboard Artist |
| Ethan Goodwin | Set Decoration Buyer |
| David Ladish | Set Dresser |
| Amy Contendor | Costumer |
| Davon Slininger | Camera Operator |
| Craig Anthony | Key Costumer |
| George Gomez | Video Assist Operator |
| Jay Cooper | Visual Effects Supervisor |
| Olivia Hamilton | Producer |
| Tina Charad | Graphic Designer |
| Anthony Cady | Key Grip |
| Christopher Ferguson | Additional Lighting Technician |
| Cale Thomas | Makeup Artist |
| Jaime Leigh McIntosh | Hair Department Head |
| Yen Do | Set Costumer |
| Anthony Carlino | Set Decoration |
| Casey Burr | Assistant Property Master |
| Nick Jones | Other |
| Mike Reiber | Paint Coordinator |
| Gay Perello | Property Master |
| Benett Rogers | Costumer |
| Mandy Moore | Choreographer |
| Thomas White | Construction Foreman |
| Wilson Tang | Digital Conform Editor |
| Anthony D. Parrillo | Art Direction |
| Stephanie Rancier | Post Production Coordinator |
| Brian Freesh | Steadicam Operator |
| Bob Wagner | First Assistant Director |
| Adrian Lubanski | Costumer |
| Michael Wahl | Dolly Grip |
| Reid Embrey | On Set Dresser |
| Ebrahim Jahromi | CG Supervisor |
| Carly Sturgeon | Second Second Assistant Director |
| Lauren Baker | Set Dresser |
| Jason Miller | Post Production Supervisor |
| Robert E. Kay | Second Assistant Director |
| Bogdan Iofciulescu | Techno Crane Operator |
| Ram Paul Silbey | Assistant Production Manager |
| Jorge Sánchez | Other |
| Mandy Artusato | Makeup Supervisor |
| Amy Jackson | Lighting Technician |
| Aaron Schulte | Electrician |
| Danny Rowe | Set Dresser |
| Julie Witherington | First Assistant Property Master |
| Jason Garcia | Other |
| Ian Churchill | Ager/Dyer |
| Ryan Jamison | Electrician |
| Eric Rood | Set Dresser |
| Robert Petrin | Camera Operator |
| Kyle Salvatore | Assistant Property Master |
| May Mitchell | Assistant Art Director |
| Katherine Farrar | Visual Effects Producer |
| Mathew Ferrante | Executive In Charge Of Production |
| Rochelle T.A. Brown | Assistant Camera |
| Adam W. Erler | Rigging Grip |
| Keith Anthony-Brown | Visual Effects Producer |
| Matthew Coleman | Lighting Technician |
| Sarah Brown | Hairdresser |
| Jerry Gregoricka | Assistant Chief Lighting Technician |
| Chris Rauch | Grip |
| Deron Hoffmeyer | Visual Effects Compositor |
| Jason Perrine | Art Direction |
| Jordan Law | Costumer |
| Bryan Mendoza | Utility Sound |
| Tyler Kettenburg | Leadman |
| Steve Zvorsky | Electrician |
| Craig Cooper | Camera Operator |
| Lisa Guerriero | Other |
| Scott M. Anderson | Set Dresser |
| Joanna Bush | Art Designer |
| Alan Roberts | Special Effects Best Boy |
| James 'Spud' Danicic | Camera Technician |
| Daniel Abbott | Rigging Grip |
| Paola Serrano | Costumer |
| Kacie Guggia | Costumer |
| Jeong-Hwa Fonkalsrud | Makeup Artist |
| Chris Cortner | Set Designer |
| Danny Diamond | Set Decoration Buyer |
| Devany Greenwood | Props |
| Erin Endow | Loader |
| Adam Black | Layout Supervisor |
| Scott Michael Smith | Recording Supervision |
| Corey Gomez | Set Dresser |
| Phillip Young | Graphic Designer |
| Olivia Ferguson | Other |
| Sam Stewart | Rotoscoping Artist |
| Janice Kavanagh | Makeup Artist |
| Kerry Hyatt | Graphic Designer |
| Kaley Boerneke | Casting Assistant |
| Erce Deli Cantu | Assistant Location Manager |
| Rick Craft | Set Dresser |
| Allison Bloom | Set Costumer |
| Jeff Snyder | Video Assist Operator |
| Lyndrea Prince | Costumer |
| Gabriela Peñúñuri | Property Master |
| Kyle Padelford | Camera Operator |
| Mallory Bradley | Costumer |
| Ron Barr | Visual Development |
| Trevor Hazel | Roto Supervisor |
| Trevor Hazel | Paint Coordinator |
| Killian Huntley | Visual Effects Production Manager |
| Timothy Mueller | Concept Artist |
| Sheldon Neill | Visual Effects Production Manager |
| Greg Ladwig | Lighting Technician |
| Mike Mentor | Camera Production Assistant |
| Jenna K. Pletcher | Other |
| Kelly Broderick | Costume Assistant |
| Jayde Dennis | Set Costumer |
| Jill Otte | Truck Costumer |
| Grace Rufin | Set Costumer |
| Deanna Saul | Costumer |
| Linda Beugger | Other |
| Darren Mauch | Set Dresser |
| David Marnell | Second Second Assistant Director |
| Jameson Everett | Production Assistant |
| Michelle Denise Lee | Makeup Artist |
