The actress' rocker ex-fiance, Matthew Bellamy, also joined in on the fun.
Both of Kate Hudson's sons have rocker fathers, but they still got excited when their mother surprised them with a Twenty One Pilots meet-and-greet.
The 37-year-old actress took 13-year-old son Ryder Robinson, whose father is Black Crowes singer Chris Robinson, and 5-year-old son Bingham Bellamy, whose father is Muse frontman Matthew Bellamy, to hang with the GRAMMY winners on Wednesday night. Her ex-fiance, Matthew, was also on hand and brought along his girlfriend, Elle Evans.
"Surprised the boys tonight with their favorite band @twentyonepilots," she captioned a group photo. "Thank you guys and the whole TOP family for making it so special. We had a blast."
Kate also shared a photo on Instagram of Bingham having a serious hang session with the band, writing: "Bing Bong in heaven."
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The Almost Famous star certainly has a lot of fun with her sons, and revealed in a radio interview last year that she's looking to expand her family. "I really want more kids," she admitted. "You know, anywhere between four and six. I just love them [kids]. They're a pain in my a**, and they're the best pain in my a**ever."