LOOK: Taylor Swift Cheers on Travis Kelce in Close Sunday Night Football Game

On Sunday night, Taylor Swift wasn't cheer captain, but she was on the bleachers.

The global popstar came to Lambeau Field in Green Bay, Wisconsin to cheer on Kansas City Chiefs tight end Travis Kelce, who Swift has been seeing since September.

Kelce and the 8-3 Chiefs took on the 5-6 Green Bay Packers in what became an unexpectedly tight matchup on Sunday Night Football. The Chiefs lost, 27-19.

Swift, wearing Kansas City red, sat in a suite with Brittany Mahomes, wife of Chiefs quarterback Patrick Mahomes.

Kelce, meanwhile, had a good night, leading the team in receiving with four receptions for 81 yards. (Kelce seemingly plays better when Swift is in the audience.)

Sunday was Swift's fifth time going to a Chiefs game, but was her first game since Oct. 22 after spending the past several weeks on tour. (Kelce attended her show in Buenos Aires, Argentina during a bye week.)

Going into the game, the Chiefs were 4-0 in games where Swift was in attendance.

Swift wasn't the only celebrity guest supporting her significant other: Olympic gymnast Simone Biles was also in attendance, cheering on husband and Packers safety Jonathan Owens.