Justin Walker is a fictional character on the ABC television series Brothers & Sisters. He is played by actor Dave Annable. In a 2010 episode, actor Dylan Larsen portrayed Justin as a young child in flashback sequences set in 1986.

David Rodman Annable is an American actor. His roles include Justin Walker on the ABC television drama Brothers & Sisters (2006–11), Henry Martin on the ABC supernatural drama 666 Park Avenue (2012–13), Pierce Harrison on the NBC medical drama Heartbeat (2016), and Neil on the Paramount+ spy series Special Ops: Lioness (2023).