I Love Melvin

Donald O'Connor

Melvin Hoover

Debbie Reynolds

Judy Schneider / Judy LeRoy

Una Merkel

Mom Schneider

Richard Anderson

Harry Flack

Allyn Joslyn

Frank Schneider

Les Tremayne

Mr. Henneman

Noreen Corcoran

Clarabelle Schneider

Jim Backus

Mergo

Barbara Ruick

Studio Guide

Robert Taylor

Himself, Cameo Appearance in Judy's Dream

Nesdon Booth

Police Captain (uncredited)

Steve Forrest

Photographer on Crane (uncredited)