Dan Reynolds is a dad again! The Imagine Dragons frontman and his wife, Aja Volkman, welcomed fraternal twin daughters, Gia James and Coco Rae, on Tuesday, March 28, his rep confirmed exclusively to People. "These have been the most magical/restless/overwhelming/rewarding hours of our lives," the pair told the magazine. "We couldn't be more in love with our girls." Dan also posted a too-cute-for-words photo of their new additions on Twitter on Thursday. Gia and Coco join big sister Arrow, 4. Congrats to the couple on their growing family!