Film:
* The Last Picture Show (1971) - He played a singer named J.D., performing his song "Breaking Up Is Hard to Do."
* Grease (1978) - He made a cameo appearance as a singer at a drive-in theater.
Television:
* The Muppet Show (1977) - He performed "Laughter in the Rain" and "Breaking Up Is Hard to Do" on the show.
* Sesame Street (1977) - He appeared in an episode, singing "I'm a Little Bit Country" with the Muppets.
* The Love Boat (1980) - He guest-starred in an episode, playing a character named "Neil."
* Happy Days (1982) - He appeared in an episode, singing "Calendar Girl" and "Breaking Up Is Hard to Do."
* The Tonight Show Starring Johnny Carson (1964-1992) - He was a frequent guest on the show, performing his hits.
* The Ed Sullivan Show (1955-1971) - He was a frequent performer on the show.
He's also had some cameos in other TV shows and documentaries, as well as appearances in music videos and talk shows. He's primarily known for his music career rather than his acting.