Tom Cruise, Julianne Hough, Diego Boneta, and the whole Rock of Ages gang premiered their picture in London tonight. The UK screening came after the LA event for Rock of Ages on Friday that brought out a Hollywood crowd including Zac Efron, Josh Duhamel, and writer Justin Theroux. Tom posed for photos with costars Mary J. Blige, Russell Brand, and Paul Giamatti, as well as director Adam Shankman. Some of their costars didn't make the trek to Britain, like Alec Baldwin and Catherine Zeta-Jones. Still, it seems like Tom, Julianne, and company are excited to be in London. Upon her arrival, Julianne tweeted, "Love being here . . . Feels like home." Adam, meanwhile, seems to be quite the royalist. He wrote, "Loving London . . . Scavenging for jubilee mementos!"