[3] Fenton started his career on stage in New York, acting on Broadway in An American Tragedy (1926) billed as Frank Moran.

[4] As Frank Fenton, he starred in the Broadway versions of Susan and God with Gertrude Lawrence and as George Kittredge in The Philadelphia Story (1939) alongside Katharine Hepburn.

His other Broadway credits include Stork Mad, O Evening Star, Dead End, and The O'Flynn.

[6] After moving to Hollywood for Barbara Stanwyck's Lady of Burlesque (1943),[7] the Hartford, Connecticut native[8] appeared in more than 80 movies and television programs.

Although the majority of his motion picture career was spent in supporting roles, he starred alongside John Carradine in Isle of Forgotten Sins (1943), which was re-issued as Monsoon.