* Grease (1978): A classic musical film based on the stage production of the same name. Travolta played the role of Danny Zuko.
* Hairspray (2007): A musical film based on the Broadway musical of the same name. Travolta played the role of Edna Turnblad, a role that won him a Golden Globe Award.
While he's not known for a long list of musicals, these two roles are iconic and cemented his place in musical film history.