| 角色 | 饰演者 | 角色介绍 |
| Thomas Reilly | 小罗伯特·唐尼 | |
| Harrison Winslow | 查尔斯·格罗丁 | |
| Penny Washington | 阿尔法·沃德 | |
| Julia | 凯拉·塞吉维克 | |
| Milo Peck | 汤姆·塞兹摩尔 | |
| Hal the Bus Driver | 大卫·佩默 | |
| Anne | 伊丽莎白·苏 | |
| Mr. Reilly | Bill Calvert | |
| Mrs. Reilly | Lisa Lucas | |
| Woman at Audition | Shannon Orrock | |
| Singer at Audition | Michael Zebulon | |
| Shirley Washington - Age 7 | Chasiti Hampton | |
| Diane Washington - Age 9 | Wanya Green | |
| Agnes Miller | Janet MacLachlan | |
| Billy Washington - Age 4 | Lavar David Levingston | |
| Bob Newhart | Robert William Newhart | |
| John McBride | 肖恩·奥布莱恩 | |
| Bartender | Steven Clawson | |
| Wanda | John Stuart Morris | |
| Music Director | George Maguire | |
| Piano Accompanist | 马克·施艾曼 | |
| Max Marco | Richard Portnow | |
| Duane Dortmueller - Age 10 | Jacob Kenner | |
| Woman in Cadillac | Janette Caldwell | |
| Young Thomas | 艾力克·洛伊德 | |
| Mrs. Brodsky | Janet Rotblatt | |
| Racetrack Ticket Clerk | Bill Capizzi | |
| Frank's Football Buddy | Will Nye | |
| Charles Polito | Eric Poppick | |
| Noelle | Susan Kellerman | |
| Mitchell | Robert Parnell | |
| Jim | Ed Hooks | |
| Motorcycle Cop | Michael Halton | |
| Sgt. William Barclay | Wren T. Brown | |
| Anne's Mother | Lorinne Vozoff |
