4,750 actors with a page here, the busiest first, counted by the productions and shows we hold for each. Another 24,181 people are named in cast lists and have no page yet.
| John Tyers Actor, Director | 4 productions |
| John Willard Actor | 4 productions |
| Johnny Stewart Actor | 4 productions |
| Jon Cypher Actor | 4 productions |
| Jonathan Groff Actor | 4 productions |
| Jordan Bentley Actor | 4 productions |
| Joseph Cawthorn Actor | 4 productions |
| Joseph James Actor | 4 productions |
| Joshua Shelley Actor, Director | 4 productions |
| Jules Munshin Actor | 4 productions |
| Julia Sanderson Actor | 4 productions |
| Julienne Marie Actor | 4 productions |
| June Allyson Actor | 4 productions |
| Justin Guarini Actor | 4 productions |
| Justine Johnstone Actor | 4 productions |
| K.J. Hippensteel Actor | 4 productions |
| Kate Levering Actor | 4 productions |
| Kate Rockwell Actor | 4 productions |
| Katherine Carrington Actor | 4 productions |
| Katrina Lenk Actor | 4 productions |
| Kay Medford Actor | 4 productions |
| Keene Curtis Actor | 4 productions |
| Keith Carradine Actor | 4 productions |
| Kelli Barrett Actor | 4 productions |
| Ken Howard Actor | 4 productions |
| Ken Jennings Actor | 4 productions |
| Ken LeRoy Actor | 4 productions |
| Kenway Hon Wai K. Kua Actor | 4 productions |
| Kerry O’Malley Actor | 4 productions |
| Kevin Earley Actor | 4 productions |
| Krystal Joy Brown Actor | 4 productions |
| Kyle Selig Actor | 4 productions |
| Laurence Guittard Actor | 4 productions |
| Lawrence Brooks Actor, Director | 4 productions |
| Leata Galloway Actor | 4 productions |
| Leslie Kritzer Actor | 4 productions |
| Lillian Hayman Actor | 4 productions |
| Lin-Manuel Miranda Actor, Book Writer, Composer, Lyricist | 4 productions |
| Linda Emond Actor | 4 productions |
| Linda Hart Actor | 4 productions |
| Liz Larsen Actor | 4 productions |
| Liza Minnelli Actor | 4 productions |
| Loni Ackerman Actor | 4 productions |
| Loretta Devine Actor | 4 productions |
| Lotte Lenya Actor | 4 productions |
| Louis Hobson Actor | 4 productions |
| Louis Zorich Actor | 4 productions |
| Louise Allen Actor | 4 productions |
| Louise Troy Actor | 4 productions |
| Lucia Giannetta Actor | 4 productions |
| Mabel Withee Actor | 4 productions |
| Mamie Parris Actor | 4 productions |
| Manoel Felciano Actor | 4 productions |
| Margaret Baxter Actor | 4 productions |
| Margaret Dale Actor | 4 productions |
| Margery Beddow Actor | 4 productions |
| Maria Calabrese Actor | 4 productions |
| Marian Mercer Actor | 4 productions |
| Marianne Tatum Actor | 4 productions |
| Mario Cantone Actor | 4 productions |