A FunnyThingHappened on the Way to the Forum is a musical with music and lyrics by Stephen Sondheim and a book by Burt Shevelove and Larry Gelbart.
A FunnyThingHappened on the Way to the Forum was made into a film in 1966 directed by Richard Lester with Zero Mostel and Jack Gilford repeating their stage roles.
A FunnyThingHappened on the Way to the Forum plot summary and character descriptions from StageAgent.com