'Tis the damn season for football and friends—just ask Taylor Swift .

The "Cruel Summer" singer joined her fiancé Travis Kelce on Sept. 14 at an early 30th birthday celebration for his Kansas City Chiefs teammate Patrick Mahomes .

As seen in a photo shared by fellow party guest Kane Brown , Taylor—clad in a black-and-ivory plaid Simkhai vest with a matching skirt and dark red platform heels from Gucci—happily posed next to the tight end, as well as the birthday boy and his wife Brittany Mahomes . Kane and his wife Katelyn Brown were also pictured in the snapshot.

"Happy birthday Pat & congrats TT," Kane wrote on Instagram Sept. 15, seemingly alluding to Taylor and Travis' recent engagement . "Thanks for hosting us Brit."

The bash—held at Patrick and Travis' so

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