American actor who became known for his starring roles on the TV series Hart to Hart, Switch, and It Takes a Thief. He also played recurring characters in the series Two and a Half Men and NCIS.
In 1949, he graduated graduated from Santa Monica High School. He signed with 20th Century-Fox early in his career and made his debut in the film, The Happy Years.
He played henchman Number 2 in the Austin Powers films.
He was born to Hazel Alvera and his father Robert John Wagner, Sr. He was married to actress Natalie Wood from 1957 to 1962 and again from 1972 to 1981. He was also married to actress Marion Marshall from 1963 to 1971 and in 1990, he married actress Jill St. John. He has two daughters, Katie and Courtney.
He co-starred with Peter Sellers in the 1963 comedy The Pink Panther.