"Thank you for being a friend" is the opening line to the theme song of which U.S. sitcom?

The theme song for NBC's sitcom "The Golden Girls" is titled "Thank You for Being a Friend". This song was a #25 pop hit for Andrew Gold in 1978. The show's version of the song was cover music sung by Cynthia Fee.

In 1985, NBC repurposed the song in a condensed form for the premiere of the TV sitcom "The Golden Girls". Once it became associated with the show, it became a familiar and nostalgic way for people to clearly remember the popular show.

Also, in a fun way, the song has been used during U.S. World Series games, at the end of Super Bowl XL, and in a modified and cheeky form in a National Football League ad.