The project is based on the 1947 comedy The Secret Life of Walter Mitty, which starred Danny Kaye. The story centers on the title character, a timid man who works at Life Magazine, developing photos of other people's adventures. He is tasked with an important mission when he is sent to find a missing negative. Patton Oswalt will play an eHarmony consultant, who helps Walter create a dating profile. Kristen Wiig stars as the woman of Walter's dreams, with Shirley MacLaine portraying Walter's mother.