| Neil Patrick Harris | Count Olaf |
| Patrick Warburton | Lemony Snicket |
| Malina Weissman | Violet Baudelaire |
| Louis Hynes | Klaus Baudelaire |
| K. Todd Freeman | Arthur Poe |
| Presley Smith | Sunny Baudelaire |
| Lucy Punch | Esmé Squalor |
| Allison Williams | Kit Snicket |
| Robbie Amell | Kevin |
| Dylan Kingwell | Quigley Quagmire |
| Richard E. Grant | Man with Beard But No Hair |
| Beth Grant | Woman with Hair But No Beard |
| Usman Ally | Hook-Handed Man |
| Matty Cardarople | Henchperson of Indeterminate Gender |
| Kevin Cahoon | Hugo |
| Bonnie Morgan | Colette |
| Kitana Turnbull | Carmelita Spats |
| John DeSantis | Bald Man |
| Jacqueline Robbins | White Faced Woman #1 |
| Joyce Robbins | White Faced Woman #2 |
| BJ Harrison | Mrs. Bass |
| Zandara Kennedy | Policewoman |
| Keegan Connor Tracy | Scout Leader |
| Asia Au-Yeung | Snow Scout #2 |
| Patrick Breen | Larry Your-Waiter |
| Ithamar Enriquez | Hector |
| Baya Ipatowicz | Snow Scout #3 |
| Avi Lake | Isadora Quagmire |
| Mamie Laverock | Snow Scout #5 |
| Aasif Mandvi | Dr. Montgomery Montgomery |
| Sara Rue | Olivia Caliban |