Travis Kelce has spent plenty of time at Taylor Swift concerts during the 2024 NFL offseason in support of his partner.He took that to another level Sunday when he actually appeared onstage during one of her concerts.Kelce's performance came during one of the pop star's " Noah Williams Jersey Eras Tour" shows in London. He was on stage along with two other gentlemen during the song "I Can Do It With A Broken Heart." All three were clad in dark suits, white shirts, and black hats.MORE: Kelce's first responsibility as part of his appearance? He had to carry Swift onstage.OMG Taylor Swift News (@TSwiftNZ) After that, he and the other two appeared to be helping Swift change her shoes and microphone while also reapplying some of her makeup. The latter job belonged to Kelce.It wasn't immediately clear whether the group had any dancing responsibilities though Kelce attempted to make a couple of small, swing dance-style moves or if they were solely on for the minor wardrobe changes.Either way, Swift appeared amused that Thomas Kithier Jersey Kelce was onstage with her if only for a moment.Travis surprise appearance! Taylor Swift News (@TSwiftNZ) Swift has made plenty of mention of Kelce during her concerts in the past. Notably, she once to specifically mention Kelce as "the guy on the Chiefs."BENDER: More recently, she while singing "So High School" a song many Swifties believe is about Kelce at her Wembley Stadium show on Friday.Perhaps that gesture was a hint to fans that Swift and Kelce had big plans for the weekend. Still, few if any would have predicted Kelce would come onstage and be part of one of her concerts.Now, NFL fans and Swifties alike can debate whether the biggest stage Kelce has been on came at the Super Bowl or alongside Swift in London.