Kevin Herbert Walker is a fictional character in the ABC television series Brothers & Sisters. He is portrayed by the Welsh actor Matthew Rhys. In a two-part 2010 episode, the actor Kasey Campbell played a teenage Kevin in flashback sequences set in 1986. Rhys is the second actor to appear in all the episodes of the series. His relationship with Scotty Wandell was included in TV Guide's list of the best TV couples of all time.