Celebrity Bradley Cooper Goes into Full Rockstar Mode at Glastonbury Festival By Brandi Fowler Brandi Fowler Instagram Website In addition to her extensive fashion, lifestyle, and beauty coverage for InStyle, Brandi has worked as a writer and editor for E! Online, a fashion and lifestyle writer for Hello! US, an editor/on-camera host for AOL, contributing writer and red carpet correspondent for Variety and Cosmopolitan, and has also served as the Hollywood correspondent for Australia's 9News' TheFIX. Her editorial features can also be found on Vitruvi, MTV News, Madame Noire, Hello Beautiful and more covering fashion, beauty, lifestyle, travel, and entertainment news. Her articles have been syndicated by the likes of Health, Marie Claire, Essence, Shape, Yahoo!, People, and more. InStyle's editorial guidelines Updated on June 23, 2017 @ 06:00PM Pin Share Tweet Email Photo: Harry Durrant/Getty Further proof that Bradley Cooper is one cool new dad ... and that he might have a second career in music. The Limitless star, who recently welcomed his first child with partner Irina Shayk, transformed into a total rockstar as he hit the stage at the Glastonbury Festival Friday in Somerset, U.K. showing off his guitar skills as he did a bit of headbanging in a black button-down top and jeans. Rocking a shaggy beard and a bob-length haircut, Cooper strummed his guitar and sang for the massive crowd with passion —a huge deal, considering Glastonbury is one of the largest music fests in the world. Once the blue-eyed thesp finished up, he threw up his hands and thanked the audience with a smile before he left the stage. New Dad Bradley Cooper Gushes About "Incredible" Lady Gaga WATCH: Bradley Cooper's Changing Looks It looks like working alongside Lady Gaga for their upcoming film A Star Is Born is paying off. In a shot from the film Mother Monster shared with fans on Instagram in April, Cooper can be seen rocking the same shaggy beard and hairstyle as he plays a guitar while Gaga croons into a microphone on stage. The film is set to hit theaters in 2018.