The 13-year-old Stranger Things star and 19-year-old aspiring actress play hooky in a video for the group's single "I Dare You."
"We are so happy to share our new video for 'I Dare You,'" The xx wrote Thursday on Instagram. "Our love letter to Los Angeles, a city close to our hearts, where we wrote and recorded parts of our album 'I See You.'
"This is the third video, our friend, @alasdairmclellan has directed for us," the band added. "He collaborated with a hero of ours, @rafsimons on the creative concept and direction. It was amazing to work with both of them and such a pleasure to meet and work with @milliebobbybrown, @parisjackson."
"I Dare You" appears on The xx's album I See You, which the group released in January. The record debuted at No. 2 on the Billboard 200, and also includes the singles "On Hold" and "Say Something Loving."
Brown and Jackson had teased the project by sharing a photo together in April. Brown, who wore Calvin Klein in "I Dare You," promoted the music video on Twitter.
"'I Dare You' to watch. @thexx @calvinkelin @alasdairmclellan #CalvinKleinBrandAmbassador," she tweeted. "Thankyou @The_xx and everyone involved this was such an amazing day,loved meeting and working with you."
Brown is best known for playing Eleven on Stranger Things, which will return for a second season on Netflix in October. Jackson, the daughter of late singer Michael Jackson, will star in the new film Gringo.