| Benjamin Morris '09 | ... Sir Ruthven, Baronet of Ruddigore (Robin Oakapple) |
| Caitlin Vincent '07 | ... Rose Maybud |
| Pedro Kaawaloa | ... Richard Dauntless |
| Jess Peritz '06 | ... Mad Margaret |
| Paul Suda | ... Sir Despard, Baronet of Ruddigore |
| Roy Kimmey '09 | ... Old Adam |
| Ryder Kessler '08 | ... Sir Roderic, Baronet of Ruddigore (dead) |
| Caroline Jackson '06 | ... Dame Hannah |
| Sammi Biegler '08 | ... Zorah |
| Jackie Granick '08 | ... Ruth |
| Olivia Benowitz '09 | ... Professional Bridesmaid |
| Allison Kline '09 | ... Professional Bridesmaid |
| Caroline Jennings '09 | ... Professional Bridesmaid |
| Annie Levine '08 | ... Professional Bridesmaid |
| Laura Hirschberg '09 | ... Professional Bridesmaid |
| David Jewett '08 | ... Ancestral Ghost/London Gentleman |
| Joshua Randall | ... Ancestral Ghost/London Gentleman |
| Henry Fienning '06 | ... Ancestral Ghost/London Gentleman |
| Nicholas Krasney '09 | ... Ancestral Ghost/London Gentleman |
| Jay Musen '09 | ... Ancestral Ghost/London Gentleman |
| Harker Rhodes '09 | ... Ancestral Ghost/London Gentleman |
| Casey Lurtz '07 | ... Producer |
| Frances Moore '06 | ... Producer |
| Emma Katz | ... Producer |
| Blase Ur '07 | ... Technical Director |
| Brandon Geller '08 | ... Assistant Technical Director |
| David Jewett '08 | ... Puppet Director |
| ... Assistant Technical Director | |
| J. Jacob Krause | ... Stage Director |
| Aram Demirjian | ... Music Director |
| Sarah Eggleston '07 | ... Stage Manager |
| Courtney Thompson '09 | ... Set Designer |
| Jessica Bloom '07 | ... Costume Designer |
| Joshua Randall | ... Lighting Designer |
| Mary Ellen Stebbins '08 | ... Lighting Designer |
| Nick Brown | ... Assistant Stage Manager |
| Allen Pope '08 | ... Orchestra Manager |
| Nora Flum '07 | ... Orchestra Manager |
| Emily Morgan '07 | ... Orchestra Manager |
| Joanna Huey '06 | ... Orchestra Manager |
| Andrea Tsurumi '07 | ... Master Painter |
| Cross Woodfield '06-07 | ... Makeup Designer |
| Leslie Nightengale '09 | ... Assistant Costume Designer |
| John Sullivan '09 | ... Assistant Music Director |
| Julia Carey '08 | ... Assistant Music Director |
| Sarah Kenney | ... Choreographer |
| Cambridge Ridley '06 | ... Publicity Manager |
| Melissa Goldman '06 | ... Benevolent President |