| Name | Character | Team | |
|---|---|---|---|
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Dustin Hoffman | Lenny Bruce | Calvin and Nobbs |
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Valerie Perrine | Honey Bruce | Unowned |
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Jan Miner | Sally Marr | Unowned |
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Stanley Beck | Artie Silver | Unowned |
| Frankie Man | Baltimore Comic | Unowned | |
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Rashel Novikoff | Aunt Mema | Unowned |
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Gary Morton | Sherman Hart | Unowned |
| Guy Rennie | Jack Goldstein | Unowned | |
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Michele Yonge | Nurse | Unowned |
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Kathryn Witt | Girl | Unowned |
| Monroe Myers | Hawaiin Judge | Unowned | |
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John DiSanti | John Santi | Unowned |
| Mickey Gatlin | San Francisco Policeman | Unowned | |
| Martin Begley | San Francisco Judge | Unowned | |
| Mark Harris | Defense Attorney | Unowned | |
| Richard Friedman | San Francisco Prosecutor | Unowned | |
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Lee Sandman | 2nd San Francisco Judge | Unowned |
| Jack Nagle | Reverend Mooney | Unowned | |
| Phil Philbin | New York Plainclothesman | Unowned | |
| Bruce McLaughlin | New York Judge | Unowned | |
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Ted Sorel | New York Attorney | Unowned |
| Clarence Thomas | New York Attorney | Unowned | |
| Mike Murphy | New York Prosecutor | Unowned | |
| Susan Malnik | Kitty (age twelve) | Unowned | |
| George DeWitt | Comic | Unowned | |
| Judy LaScala | Chorus Girl | Unowned | |
| Don Newsome | Connection | Unowned | |
| Allison Goldstein | Kitty (age one) | Unowned | |
| Winston Lee | Chinese Waiter | Unowned | |
| Bridghid Glass | Kitty (age two) | Unowned | |
| Joe Mencel | Court Reporter | Unowned | |
| Richard O'Barry | Court Clerk | Unowned | |
| Beth Challis | Club Owner | Unowned | |
| Robert Parsons | Chicago Plainclothesman | Unowned | |
| Cecil Seay | Chicago Plainclothesman | Unowned | |
| Bob Collins | New York Assistant DA | Unowned | |
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Lynette Bernay | Girl in Dressing Room (uncredited) | Unowned |
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Bob Fosse | The Interviewer (voice) (uncredited) | Unowned |
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Phyllis Hyman | Nightclub Patron (uncredited) | Unowned |
| Lillian Zuckerman | Nightclub Patron (uncredited) | Unowned | |
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Mal Jones | New York Court Clerk (uncredited) | Unowned |
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David Joseph Martinez | Marine Private (uncredited) | Unowned |
| Alan Ormsby | Man in Audience of Cellar Club (uncredited) | Unowned | |
| Frank Orsatti | Hunter (uncredited) | Unowned | |
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Glenn R. Wilder | Hunter (uncredited) | Unowned |
| Zorita | Nightclub Owner (uncredited) | Unowned | |
| Cindy Embers | Opening Stripper (uncredited) | Unowned | |
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Rod Ball | Man in Audience of Cellar Club | Unowned |