Lana Del Rey, Karol G, The 1975 and Tomorrow X Together will also topline this summer's Lolla in Chicago.
The bride and groom exchanged vows during a short break in the pop star's set, much to the delight of other die-hards in attendance.
Jennie, as well as members of BTS, ENHYPEN and MONSTA X, also attended the concert.
"I wish you a life of happiness. Congratulations," the pop star told the couple.
The Chicago fest will also feature Alvvays, Perfume Genius, Weyes Blood, Kelela and Koffee, among others.
Electronic dance legends Kaskade and deadmau5 closed out the third and final night of Billboard’s SXSW concert series.
Taylor Swift's The Eras Tour has arrived. See photos from opening night of the tour.
Doritos® and Billboard partnered to bring bold flavors to the city of Austin, TX during SXSW® 2023
"Now THAT is how you put on a show," a Swiftie wrote.
Billboard officially returned to SXSW with three nights of star-studded concerts.
