His recent movie is Last of the Mustangs.

Wagner was the most prominent client to break with him in the early 1950s, when Willson's and Hudson's homosexuality became a topic of Hollywood gossip. Even for the straight actors represented by Willson, to be represented by a gay man in the 1950s meant that they likely were perceived as gay by a homophobic society, so Wagner and others abandoned him to preserve their masculine images, as well as their careers.

Wagner's career as a supporting player in movies was solid in the 1950s, but his film career petered out in the 1960s (as did his first marriage to Natalie Wood), and he turned to television, with great success. His notable roles include:

Prince Valiant in "Prince Valiant" (1954) Bud Corliss in "A Kiss Before Dying" (1956) George Lytton in "The Pink Panther" (1963) Alexander Mundy in "It Takes a Thief" (1968-70) David Corey in "The Name of the Game (TV series)" (1970-1971) Dan Bigelow in "The Towering Inferno" (1974) Pete T. Ryan in "Switch" (1975-1978) Jonathan Hart in "Hart to Hart" (1979-84) Number Two in the "Austin Powers" movies (1997, 1999, 2002) Jack Fairfield in "Hope & Faith" (2004-) Wagner gained a good deal of notoriety for his on-off marriage to actress Natalie Wood, who left him in the early 1960s for Warren Beatty. They remarried in the 1970s, and Wagner was present when she drowned in mysterious circumstances.

Robert Wagner has been married four times:

Natalie Wood (1957-1962) Marion Marshall (1963-1970)- one daughter Katie Natalie Wood (1972-1981) - one daughter Courtney & one stepdaughter Natasha Gregson Jill St. John (1990- ) In 1953, Wagner was nominated for the Golden Globe Award for Most Promising Newcomer in motion pictures for his performance in Stars and Stripes Forever. In 1970, he was nominated for an Emmy Award for "Best TV Actor" for his performance in "It Takes a Thief" and for four Golden Globe awards for "Hart to Hart."