* Neil Patrick Harris as Count Olaf
* Patrick Warburton as Lemony Snicket
* Louis Hynes as Klaus Baudelaire
* Malina Weissman as Violet Baudelaire
* Presley Smith as Sunny Baudelaire
Recurring cast:
* K. Todd Freeman as Mr. Poe
* Usama Ally as Mr. Justice Strauss
* Catherine O'Hara as Dr. Georgina Orwell
* Don Johnson as Sir
* Roger Bart as Vice Principal Nero
* Joan Cusack as Justice Strauss
* Nathan Fillion as Jacques Snicket
* Aasif Mandvi as Montgomery Montgomery