In addition to collaborating musically, Kelly and his fiancée, Megan Fox, have been known to hang out with Barker and Kardashian. The two couples enjoyed a night out at UFC 260 in March 2021, and the women attended the guys' surprise rooftop concert in June. The power couples also attended the 2021 MTV Video Music Awards in Brooklyn, New York, last September.
"Kourtney Kardashian, Travis Barker, Megan Fox and Machine Gun Kelly have had double-date nights many times and are all good friends," a source told ET last March. "They have a great time when they hang out as couples and it's very natural, easy and fun."