Roskilde Festival completes 2019 line-up with Janelle Monáe, Skepta, Vampire Weekend and 65 more artists Other new names include Marina, Noel Gallagher’s High Flying Birds, Maggie Rogers, Johnny Marr, Behemoth, Aldous Harding, DJ Koze, Sheck Wes, Saweetie, Weyes Blood and The Comet Is Coming 29 June