The Jonas Brothers 3D Premiere!

All four Jonas Brothers suit up for the premiere of the 3D Concert flick at the El Capitan Theatre in Hollywood on Tuesday night (February 24).

The musical trio — Nick, Joe, and Kevin — announced last night that they’re surprising a few hundred fans over the weekend by popping into random theaters across the country.

Jonas Brothers: 3D Concert Experience hits theaters THIS Friday.

15+ pics inside of the JoBros walking the purple carpet…