They may be young but these boys know how to rock!
Harry and Niall left the rest of the One Direction dudes behind and headed out to the Rolling Stones concert in Washington D.C. on Monday night!
When you're as big as 1D though, you don't just go to the show, you get to hang backstage with Lenny Kravitz!
The 3 musical amigos all got to know each other in Rolling Stone guitarist Ronnie Wood's dressing room, along with Ronnie's MUCH younger wife, Sally.
Niall was PSYCHED to get to meet the rock legends and tweeted out later: