Kevin Kline

Cole Porter

Ashley Judd

Linda Porter

Jonathan Pryce

Gabriel

Kevin McNally

Gerald Murphy

Sandra Nelson

Sarah Murphy

Allan Corduner

Monty Woolley

Peter Polycarpou

Louis B. Mayer

Keith Allen

Irving Berlin

James Wilby

Edward Thomas

Kevin McKidd

Bobby Reed

Caroline O'Connor

Ethel Merman

Dean Constantin

Hotel Porter

Peter Jessop

Diaghilev

Angie Hill

Ellin Berlin

Cole Porter

Musical Performer - "You're The Top"

Robbie Williams

Musical Performer - "It's De-Lovely"

Elvis Costello

Musical Performer - "Let's Misbehave"

Alanis Morissette

Musical Performer - "Let's Do It, Let's Fall In Love"

Sheryl Crow

Musical Performer - "Begin the Beguine"

Mick Hucknall

Musical Performer - "I Love You"

Diana Krall

Musical Performer - "Just One of Those Things"

Lara Fabian

Musical Performer - "So In Love"

Natalie Cole

Musical Performer - "Ev'ry Time You Say Goodbye"

John Barrowman

Musical Performer - "Night and Day"

Hélène Cardona

Club Guest (voice) (uncredited)

Rene Costa

Club Guest (uncredited)

Richard Dillane

Bill Wrather

Edward Baker-Duly

Boris Kochno

Harry Ditson

Dr. Moorhead