Mr. Smith Goes to Washington
Delmar acted in "Mr. Smith Goes to Washington" alongside James Stewart and in "Heidi" with Shirley Temple. His eight siblings (five brothers and three sisters) also acted in films, including Coy Jr., Harry and Bobs. He and his brothers played the governor's sons in "Mr. Smith Goes to Washington". The family was honored by the Hollywood Chamber of Commerce by placing the Watson family ("the First Family of Hollywood") star on the Hollywood Walk of Fame, at 6674 Hollywood Boulevard in Hollywood.