William ("Wak") King (born January 30, 1949) is an American founding member of the Commodores. In addition to being the group's choreographer, he plays trumpet, guitar, synthesizer, flute, and congas/percussion.
King was born in Birmingham, Alabama. After college, he considered playing tennis professionally but decided to continue his career with the Commodores. He married his songwriting partner and fellow Grammy Award nominee, Shirley Hanna-King in 1976 and they have four children: Ryan Hanna King (actor), Adam J King (Stanford University graduate who appeared on MTV's The Real World series), Noah King (performer with newkingdomsayshi), and Leah Hanna King (singer and songwriter).