William Louis Hudson Jr. is an American musician and actor. He was a vocalist in The Hudson Brothers, a band he formed in 1965 with his two younger brothers, Brett and Mark. He later had a brief acting career, appearing in supporting roles in Zero to Sixty (1978), Hysterical (1983), and Big Shots (1987). He also appeared in a recurring guest role on the series Doogie Howser, M.D..

The Hudson Brothers were an American musical group formed in Portland, Oregon, consisting of brothers Bill, Brett and Mark Hudson. They were discovered by a record producer while recording music at a local studio, and offered a recording contract. After releasing several garage rock singles in the late 1960s as The New Yorkers, the group began releasing material under the names Everyday Hudson, and Hudson.