| Jerry Lewis | ... | Stanley / Himself |
 | Alex Gerry | ... | Mr. Novak, Hotel Manager |
| Bob Clayton | ... | Bob, Bell Captain |
| Sonnie Sands | ... | Sonnie, Bellboy (as Sonny Sands) |
| Eddie Shaeffer | ... | Eddie, Bellboy |
| Herkie Styles | ... | Herkie, Bellboy |
| David Landfield | ... | David, Bellboy |
| Bill Richmond | ... | Stan Laurel |
| Larry Best | ... | Apple Man |
| Cary Middlecoff | ... | Himself |
| Art Terry | ... | Himself (as The Novelites) |
| Frankie Carr | ... | Himself (as The Novelites) |
| Joe Mayer | ... | Himself (as The Novelites) |
| Stanley Allan | ... | Hotel Guest |
| Duke Art Jr. | ... | Bit part |
| Eddie Barton | ... | Doorman |
| Murray Barton | ... | Murray, bellboy |
| Howard Brooks | ... | Bit part |
| Ricki Dunn | ... | Hotel Guest |
| Jack Durant | ... | Ferdinand Manville, Husband who slips on waxed floor |
| Jimmy Gerard | ... | Man fighting with wife in lobby |
| Matilda Gerard | ... | Woman fighting with husband in lobby |
| Paul Gray | ... | Paul, assistant manager |
| H.S. Gump | ... | Gangster |
| Jack Henkins | ... | Hotel Guest |
| Elise Jayne | ... | Miss Winkley |
| Dick Lynn | ... | Desk Clerk (as Dick Lynne) |
| Pat Mack | ... | Thin Mrs. Hartung |
| John G. Morgan | ... | Hotel Guest |
| Larry K. Nixon | ... | Bell captain who tells Bob Clayton about the union meeting |
| B.S. Pully | ... | Steve, head gangster (as B. S. Pully) |
| Guy Rennie | ... | Mr. Carter |
| Max 'Slapsie Maxie' Rosenbloom | ... | Maxie, Gangster (as Max Rosenbloom) |
| Benny Ross | ... | Hotel Guest |
| Joe E. Ross | ... | Joey, Gangster |
| Frankie Scott | ... | Hotel Guest |
| Roy Sedley | ... | Mr. Sedley, man with sunburn |
| Sammy Shore | ... | Hotel Guest |
| Sarah Smith | ... | Fat Mrs. Hartung |
| Art Stanley | ... | Bell captain |
| Hal Winters | ... | Hal, desk clerk |
| Mike Letz | ... | Gangster bodyguard (as Mike Zetz) |
| rest of cast listed alphabetically: |
| Milton Berle | ... | Himself / Bellboy (uncredited) |
| Bobby Byron | ... | Texan (uncredited) |
| Sheila Caplan | ... | Autograph hound (uncredited) |
| Ron Corsi | ... | Autograph hound (uncredited) |
| Alberta Dee | ... | Autograph hound (uncredited) |
| Isobel Elsom | ... | Hotel Guest (uncredited) |
| Leon Fields | ... | Leon, member of entourage (uncredited) |
| Paul Gerard | ... | Hotel Guest (uncredited) |
| Tilly Gerrard | ... | Fighting woman (uncredited) |
| Ernest D. Glucksman | ... | Herman (uncredited) |
| Sid Gould | ... | Gin player (uncredited) |
| Paul Grayson | ... | Hotel Guest (uncredited) |
| Jay W. Jensen | ... | Hotel guest (uncredited) |
| Jack Keller | ... | Golfer, Cary Middlecoff's opponent (uncredited) |
| Jack Kruschen | ... | Jack E. Mulcher, President of Paramount Pictures (uncredited) |
| Bill Matuza | ... | Autograph hound (uncredited) |
| Del Moore | ... | Voice of golf announcer (uncredited) |
| Ben Novak | ... | Owner of Fontainebleau Hotel (uncredited) |
| Danny Rogers | ... | Gin player (uncredited) |
| Bartley Shank | ... | Golf announcer (uncredited) |
| Walter Winchell | ... | Narrator (uncredited) (voice) |
| Ned Wynn | ... | Bellhop (uncredited) |
| Sam Younghans | ... | Desk Clerk (uncredited) |
