Felix Ungar
Jack Lemmon
Oscar Madison
Walter Matthau
Vinnie
John Fiedler
Cecily Pigeon
Monica Evans
Gwendolyn Pigeon
Carole Shelley
Murray
Herb Edelman
Roy
David Sheiner
'Speed'
Larry Haines
Waitress
Iris Adrian
Chambermaid (uncredited)
Billie Bird
Sportswriter
Heywood Hale Broun
Hotel Clerk
John C. Becher
Go-go Dancer (uncredited)
Angelique Pettyjohn
Themselves Baseball Player
Roberto Clemente
Themselves Baseball Player
Matty Alou
Themselves Baseball Player
Maury Wills
Self (uncredited)
Jack Fisher
Themselves Baseball Player
Vernon Law
Themselves Baseball Player
Ken Boyer
Themselves Baseball Player
Bud Harrelson
Themselves Baseball Player
Jerry Buchek
Themselves Baseball Player
Ed Kranepool
Maury Allen