Dwayne Johnson, aka The Rock, is a champion once more! This time, the 43-year-old actor, who rose to fame as a WWE wrestling star, has set a Guinness World Record for taking selfies! He achieved his latest victory in London at the premiere of his newest movie, San Andreas, on Thursday, a week before the film's May 29 release. Johnson, who used an iPhone to capture the snaps, also shared a, yep, selfie victory video on Instagram. "London, we did it!" he says in the clip, holding a Guinness World Record certificate as a large crowd cheers.??