Robert Riskin

From Wikipedia Robert Riskin (March 30, 1897–September 20, 1955) was an American screenwriter and playwright, best known for his collaborations with director-producer Frank Capra.
Crew

It Happened One Night
Screenplay

Lost Horizon
Screenplay

Mr. Deeds Goes to Town
Screenplay

Meet John Doe
Screenplay, Producer

Platinum Blonde
Dialogue

You Can't Take It with You
Screenplay

The Thin Man Goes Home
Story, Screenplay

Lady for a Day
Screenplay

Ex-Lady
Story

The Whole Town's Talking
Screenplay

Magic Town
Story, Writer, Producer

Rough and Ready Reggie
Writer

When You're in Love
Director

Broadway Bill
Screenplay

Virtue
Screenplay

Arizona
Adaptation, Dialogue

Mister 880
Screenplay

Riding High
Screenplay

Half Angel
Screenplay

The Real Glory
Associate Producer

Men in Her Life
Writer

Three Wise Girls
Writer

The Big Timer
Story, Dialogue

You Can't Run Away from It
Screenplay

Shopworn
Dialogue

Here Comes the Groom
treatment, Story

The Night Club Lady
Writer

The Miracle Woman
Theatre Play, Screenplay

American Madness
Story, Dialogue

Carnival
Writer

Pocketful of Miracles
Original Film Writer

The Cowboy and the Lady
Additional Writing

The Cummington Story
Producer

They Shall Have Music
Associate Producer

Illicit
Theatre Play

Library of Congress
Producer

Many a Slip
Writer

Mr. Deeds
Original Film Writer

Ann Carver's Profession
Screenplay, Original Story