The tight end was deemed Swift's "boyfriend" in a now-viral TikTok video.
The photo came after Swift's fourth appearance at a Kansas City Chiefs game.
The pop superstar watched the Sunday (Oct. 22) game at Arrowhead Stadium with Brittany Mahomes.
Kittle joins his 49ers teammates Christian McCaffrey, Ross Dwelley, Charlie Woerner & Kyle Juszczyk for a musical tight end celebration.
"I am pro romance. Yay romance," the pop star and TV show host wrote on Instagram.
Christina Aguilera stopped by ‘Jimmy Kimmel Live!’ and discussed the possibility of being mentioned in fellow ‘Mickey Mouse Club’ star Britney Spears’ new book, ‘The Woman in Me.’ Post Malone opened up about being complimented by Taylor Swift and losing a game of beer pong to Travis Ke
He also said the singer is a "good girl" and joked that Chief's nation is "glad she's here."
"We were praying she’d come into the booth and sing for us," the veteran football announcer jokes to Jimmy Kimmel.
The football player previously thanked the sports commentator for encouraging Swift to give him a chance.
The rumored couple pretty much confirmed their relationship while the way to an SNL afterparty over the weekend.