Justin Bieber is getting a co-sign from a major player. The pop superstar hit the studio with iconic producer Rick Rubin this week.

The Biebs posted a photo of himself with the Def Jam founder, who’s produced for countless hip-hop legends including Jay Z, Beastie Boys, Eminem, Run–D.M.C., and Kanye West.

His manager Scooter Braun also posted the pic on Instagram with the caption, “Working on some history! Rick and JB.”

According to TMZ, the two linked up for their first studio session on Tuesday night. Bieber is reportedly going for an “urban” sound on his upcoming album, due sometime this year.

This would not be his first foray into hip-hop. His 2012 album Believe included collaborations with Drake, Big Sean, and Nicki Minaj, while 2013’s Journals featured Lil Wayne, Future, and Chance the Rapper.