William Louis Courtleigh was an American stage and film actor who appeared in Broadway productions, vaudeville theatre, and silent films

The Lambs, Inc. is a social club in New York City for actors, songwriters, and others involved in the theatre. It is America's oldest theatrical organization. "The Lambs" is a registered trademark of The Lambs, Inc.; and the club has been commonly referred to as The Lambs Club and The Lambs Theater since 1874.