VIDEO : Bradley Cooper Crashes Kris Kristofferson's Glastonbury Set

Bradley Cooper surprised the crowd at Glastonbury on Friday as he shot scenes from his upcoming film, "A Star is Born." Cooper appeared onstage ahead of Kris Kristofferson's set and performed for the crowd and cameras with his guitar volume turned off to the audience. The actor is directing and starring in the film alongside Lady Gaga. He and Gaga filmed similar scenes at Coachella in April. Before leaving the stage, Cooper thanked the audience, saying, "You guys were awesome, that was great ? it's my sheer pleasure to introduce Kris Kristofferson." The country singer was also joined by Johnny Depp for "Sunday Morning Coming Down" and "The Silver Tongued Devil and I."