Arsenic and Old Lace

as Mortimer Brewster

as Reporter at Marriage License Office

as Dr. Gilchrist

as Mr. Witherspoon

as Sergeant Brophy

as Gibbs

as Taxi Cab Driver

as Reverend Harper

as Officer Patrick O'Hara

as Lt. Rooney

as Aunt Martha Brewster

as 'Teddy Roosevelt' Brewster

as Officer Saunders

as Aunt Abby Brewster

as Dr. Einstein

as Elaine Harper Brewster

as Jonathan Brewster

as Marriage License Clerk

as Judge Cullman