Taylor Swift has a new music video for "I Bet You Think About Me (Taylor’s Version) [From The Vault]."

The single is a Vault song that didn't make the final cut of Taylor Swift's original 'Red' album in 2012.

The video is directed by Blake Lively and written by Swift and Lively.

Lively and her husband Ryan Reynolds are good friends with Taylor Swift.

They supported the singer during her recent 'Saturday Night Live' performance.

"I Bet You Think About Me" features vocals from Chris Stapleton.

The song is about a swanky ex from Beverly Hills, whose friends looked down on Taylor when they were dating.

Now that they’re broken up, she bets they still think about her.

The music video stars Miles Teller ('Whiplash', 'Top Gun: Maverick') as a groom on his wedding day.

While all those attending and decor are donned in white, there's one guest who brings a dash of red to the occasion.

Taylor Swift is alternately a server, giving a wedding speech, making trouble at the kid's table, and performing at the wedding.

The chorus lyrics go: "But now that we’re done and it’s over // I bet you couldn’t believe // When you realized I’m harder to forget // Than I was to leave // And I bet you think about me."

Here's the video.