- Kevin Kline
- Cole Porter
- Ashley Judd
- Linda Porter
- Jonathan Pryce
- Gabe
- Kevin R. McNally
- Gerald Murphy
- Allan Corduner
- Monty Woolley
- Sandra Nelson
- Sara Murphy
- Keith Allen
- Irving Berlin
- James Wilby
- Edward Thomas
- Kevin McKidd
- Bobby Reed
- Peter Polycarpou
- L.B. Mayer
- Richard Dillane
- Bill Wrather
- Edward Baker-Duly
- Boris Kochno
- Natalie Cole
- Musical Performer - "Ev'ry Time You Say Goodbye"
- Elvis Costello
- Musical Performer - "Let's Misbehave"
- Sheryl Crow
- Musical Performer - "Begin the Beguine"
- Alanis Morissette
- Musical Performer - "Let's Do It, Let's Fall In Love"
- Caroline O'Connor
- Musical Performer - "Anything Goes"
- Angie Hill
- Ellin Berlin
- John Barrowman
- Jack / Musical Performer - "Night and Day"
- Nicola Dawn
- Party Guest (uncredited)
- Lara Fabian
- Musical Performer - "So In Love"
- Vivian Green
- Musical Performer - "Love For Sale"
- Mick Hucknall
- Musical Performer - "I Love You"
- Lemar
- Musical Performer - "What Is This Thing Called Love?"
- Diana Krall
- Musical Performer - "Just One of Those Things"
- Robbie Williams
- Musical Performer - "It's De-Lovely"
- Harry Ditson
- Dr. Moorhead
- Tayler Hamilton
- Honoria Murphy
- Lexie Peel
- Patrick Murphy
- Greg Sheffield
- Boath Murphy
- Peter Jessop
- Diaghilev
- Jeff Harding
- Cody
- Susannah Fellows
- Mrs. L.B. Mayer
- Teddy Kempner
- Stage Manager
- Francesca Jaynes
- Choreographer
- Irwin Winkler
- Director, Producer
- Jay Cocks
- Screenwriter
- Stephen Endelman
- Music Arranger, Producer
- Rob Cowan
- Producer
- Charles Winkler
- Producer
- Gail Egan
- Executive Producer
- Simon Channing Williams
- Executive Producer
- Tony Pierce-Roberts
- Cinematographer
- Julie Monroe
- Film Editing
- Eve Stewart
- Production Design
- John Hill
- Art Director
- John Bush
- Set Decoration
- Janty Yates
- Costume Design
- Nina Gold
- Casting
- Georgina Lowe
- Line Producer
- Sarah Monzani
- Makeup Designer
- Simon Thompson
- Hair Designer
