"A true ode to Philadelphia, joy and brotherly love," the caption read. "Can you name everyone who made it to the party? 👀"
The limited edition poster depicts a sprawling holiday party across the city of Philadelphia with several special guests and Easter eggs, including cartoon versions of Swift, 34, and Travis, 35, cuddling together in the background. Swift's cartoon persona is wearing a shimmering silver dress, while Travis is clad in Kansas City Chiefs red and gold.
Apart from Jason's brother and his girlfriend, the poster also features his wife Kylie Kelce and their three daughters Wyatt, 4, Elliotte, 3, and Bennett, who was born in February 2023.
Fans also took to the comments of the Instagram post to point out other celebrities who made the poster artwork, including Philadelphia Flyers mascot Gritty, Boyz II Men, Stevie Nicks and basketball player Joel Embiid, among others.
Earlier this month, the "New Heights" podcast account, which is co hosted by Jason and Travis, revealed via X that Nicks, 76, and the former Eagles center would be teaming up for a holiday-themed album.
"The crossover we didn't know we needed," the October 2 post read. "Coming soon to a Christmas album near you."
The first holiday album, A Philly Special Christmas, raised over $1 million for local charities when it debuted in 2022. As for the second record released in 2023, A Philly Special Christmas Special included 10 holiday songs as well as an original number from Jason, titled "Fairytale of Philadelphia," which also featured the vocals of younger brother Travis. Following its release, the tune rose to No. 1 on the iTunes chart.
"The Kelce duet reached No. 1 on iTunes," Jason said on a November 2023 "New Heights" episode. "That's right, 'Fairytale of Philadelphia,' our song from the new Christmas album debuted at No. 1 on the iTunes chart. That's right, we are officially rock stars."
When it comes to whether or not Swift will appear on the holiday record, Jason has previously stated that it would be "pretty incredible" for her to lend her voice to the album, teasing on an October 2023 Today appearance, "Maybe. Not this one, not this time around. ... Maybe in the future."