Born on April 15, 1940, he was the son of actors Robert Walker and Jennifer Jones. He grew up in Hollywood's golden era, making his film debut in 1963's "The Hook." Gaining recognition for his role in "Star Trek" as Charlie Evans, he became known for his boyish charm and intense performances. Throughout the 1960s and 1970s, he appeared in various films and TV shows, including "Easy Rider" and "Ensign Pulver." Beyond acting, he led a private life, focusing on family until his passing in 2019.