Renée Zellweger - Judy Garland
Jessie Buckley - Rosalyn Wilder
Finn Wittrock - Mickey Deans
Rufus Sewell - Sid Luft
Michael Gambon - Bernard Delfont
Richard Cordery - Louis B. Mayer
Royce Pierreson - Burt Rhodes
Darci Shaw - Young Judy
Andy Nyman - Dan
Daniel Cerqueira - Stan
Bella Ramsey - Lorna Luft
Lewin Lloyd - Joey Luft
Tom Durant Pritchard - Ken Frisch
John Dagleish - Lonnie Donegan
Adrian Lukis - Dr Hargreaves
Gemma-Leah Devereux - Liza Minnelli
Gus Barry - Mickey Rooney
Jodie McNee - Vivian
Gus Brown - Porter Reg
Matt Nalton - Music Director
Bentley Kalu - Georgie
Martin Savage - Mr. Horowitz
Phil Dunster - Ben
Gaia Weiss - Abbie
Lucy Russell - Publicist
John Mackay - Johnnie Ray
Natasha Powell - Ethel Gumm
Bradley Banton - James
Ed Stoppard - Interviewer
David Shields - Photographer
Tim Ahern - Walter Rickerts
Peter Forbes - Richardson
Arthur McBain - Askith
David Rubin - Noel
Anthony Shuster - Male Audience Member 1
Alistair Cope - Male Audience Member 2
Jack Jagodka - Tanned Man
Fenella Woolgar - Margaret Hamilton
Bronte Lavine - Fine Feather Dancer
Emily Warner - Fine Feather Dancer
Flora Dawson - Fine Feather Dancer
Gillian Parkhouse - Fine Feather Dancer
Jennifer Davison - Fine Feather Dancer
Jenny Wickham - Fine Feather Dancer
Joelle Dyson - Fine Feather Dancer
Lucy Carter - Fine Feather Dancer
Rebecca Fennelly - Fine Feather Dancer
Sam Wingfield - Fine Feather Dancer
Antony Barlow - Talk of the Town Audience
Pierre Bergman - Cabaret Audience Member
Martin Bratanov - Male Audience
Colin Braysher - Percussionist Burt's Band
Jonathan Cheetham - Drag Bar Customer
Nick Davison - Backstage Crew Member
Emily Ferrier - Judy's Party Guest
Julian Ferro - Judy's Guest
Luke Fetherston - Judy's Choreographer
Keith Hide - Principal Violinist Burt's Band
Patrick Loh - Theatre Passerby
Kate Margo - Talk of Town Waitress
Marco Mastrocola - Latin Drummer
Zivile Matikiene - Audience
Martyn Mayger - Johnnie Ray's Drummer
Diana Alexandra Pocol - Young Ava Gardner
Robert Ryan - Paparazzi Photographer
Philippe Spall - L.A. Cab Driver
Jules Tait - Alto Sax Player Burt's Band
Stuart Whelan - Film Crew Member