Taylor Swift appeared alongside her fiancé, Kansas City Chiefs tight end Travis Kelce, at a pre-birthday gathering for Chiefs quarterback Patrick Mahomes on Monday night, photos and short video posted to social media show.

The outing came a day after Swift attended the Chiefs' home game at Arrowhead Stadium, where she was seen moving between public areas and a private suite while remaining largely out of view behind a large screen. The Chiefs lost the game 20-17 to the Philadelphia Eagles.

Images and a short clip shared on Instagram by country singer Kane Brown and his wife, Katelyn Jae, show Swift and Kelce among teammates and partners gathered to celebrate Mahomes ahead of his 30th birthday on Sept. 17. The post included footage of the group singing "Happy Birthday," though Swift and Kelce did not appear in every frame of the cake moment.

In the photos, Swift wore a sleeveless plaid vest paired with a short matching skirt and burgundy platform heels. Kelce coordinated in a white button-down with rolled sleeves, a black tie, tailored shorts and lace-up oxfords. A group photo also showed Swift with her arm around Brittany Mahomes and standing near Patrick Mahomes.

The social posts noted toasts for both Mahomes' upcoming birthday and the engagement of Swift and Kelce, who announced their engagement earlier this year. Kane Brown's caption included a red heart emoji and a short congratulatory message to the couple.

Swift's visible appearance at the party drew attention after she was largely concealed at Arrowhead Stadium on Sunday, where some fans speculated about the purpose of the large screen that accompanied her movements. The social-media images appeared to quell speculation that she had significantly altered her appearance ahead of an anticipated album release; Swift's 12th studio album, Life of a Showgirl, is scheduled for release on Oct. 3.

Representatives for Swift and Kelce did not immediately respond to requests for comment.

The outings mark another public moment for the couple this football season. Swift has attended multiple Chiefs games since publicly supporting Kelce, drawing widespread media coverage and fan discussion about her visibility at events and how the pair have navigated public and private appearances.

Monday's gathering continued a pattern of celebrity and athlete socializing around Kansas City's football calendar, with teammates, spouses and musical friends joining to mark milestones both personal and professional for members of the Chiefs organization.