Nicole Kidman as Lucille Ball

Javier Bardem as Desi Arnaz

J.K. Simmons as William Frawley

Nina Arianda as Vivian Vance

Tony Hale as Jess Oppenheimer

Alia Shawkat as Madelyn Pugh

Jake Lacy as Bob Carroll Jr.

Linda Lavin as Older Madelyn Pugh

Ronny Cox as Older Bob Carroll

John Rubinstein as Older Jess Oppenheimer

Clark Gregg as Howard Wenke

Nelson Franklin as Joe Strickland

Jeff Holman as Roger Otter

Jonah Platt as Tip Tribby

Christopher Denham as Donald Glass

Brian Howe as Charles Koerner

Ron Perkins as Macy

Baize Buzan as Mary Pat

Matt Cook as 1st AD

Joshua Bednarsky as PA Bill

Dana Lyn Baron as Miss Rosen

Dan Sachoff as David Levy

Max Silvestri as David Hart

Renee Pezzotta as Italian Woman

Breanna Wing as Chorus Girl Angie

Caroline Anderson as Chorus Girl Daisy

Jamie Miller as Chorus Girl Patty

Gail Rastorfer as Dresser

Russ Burd as Irwin Gotlieb

Guido Cocomello as Italian Bellman

John Funk as J. Edgar Hoover (voice)

Angela Leib as Koerner's Secretary

David Saenz as Musician Outside CIro's

Stephanie Lesh-Farrell as Radio Show Katy

Ron Ostrow as Radio Show Man

Pamela Bell Mitchell as Radio Show Woman

Lawrence Novikoff as Sam Stein

Jack Benza as Security Guard Bobby

Peter Onorati as Vittorio

Evie Nicholson as Woman Outside Ciro's

Rick Batalla as Tommy Wardrobe

John F. Carpenter as Radio Show Announcer

Melinda Sullivan as Ann Miller

Gus Lynch as Camera B Focus Puller

Allan Wayne Anderson as Camera C Focus Puller

David Jonathan Fine as Boom Operator

Val Chmerkovskiy as Ciro's Dancer

Asiel Hardison as Ciro's Dancer

Reina Hidalgo as Ciro's Dancer

Will Loftis as Ciro's Dancer

Noelle Marsh as Ciro's Dancer

Leo Moctezuma as Ciro's Dancer

Nayara Núñez as Ciro's Dancer

Britt Stewart as Ciro's Dancer

Eddie Torres Jr. as Ciro's Dancer

Jenna Johnson as Ciro's Dancer

James Patrick Duffy as Man #1

Emily Marsh as Woman #1

Cece Camps as Woman #2

Daniel Armella as Stagehand

Molly Meyer as Waitress

Shiree Nelson as Studio Staffer

Christian Roberts as Camera A Focus Puller

Chris Wolfe as Announcer