Taylor Swift popped up at the Golden Globes on Sunday and fans were confused as to why.

It appears, however, the pop star was there to support boyfriend Joe Alwyn, who appeared in The Favorite. While Alwyn himself didn't win, the film was nominated for Best Motion Picture in a Musical or Comedy and Best Screenplay for a Motion Picture.

Alwyn walked the red carpet alone. Swift was seen entering the show through another entrance. It's unclear why the couple made this decision.

"Taylor showed up at the afterparty and stayed until the end with Joe," a source told People. "She and Emma Stone were chatting up a storm. Taylor just stayed by Joe's side the whole night."

Swift, 29, wasn't just at the awards show as a spectator. She took the stage during the broadcast alongside Idris Elba to present the awards for Best Original Score and Best Original Song in a Motion Picture.

The "Look What You Made Me Do" singer wore an off-the-shoulder black sequin Atelier Versace gown. She paired the dress with Lorraine Schwartz and Ofira jewelry and bold red lipstick.

Lady Gaga on the 2019 Golden Globes Red Carpet

More From Lite 98.7