James Corden and Dominic Cooper have been friends for almost 15 years, and even lived together for a while, so when the pair get the chance to hang out for work-related reasons, it's always a joy to watch. This week, Dominic visited The Late Late Show with James Corden to discuss his new movie Mamma Mia Here We Go Again, but talk quickly turned to their enduring friendship. James challenged his pal to a game of "Shock Therapy", which involved them answering questions about each other, threatened with an electric shock if the answer was wrong. Dominic (or "Nominic", as fellow guest Rebecca Ferguson referred to him) didn't seem confident in his ability to answer, though he did nail it on a couple of occasions. James, meanwhile, proved that he knows the Cooper family pretty well . . . but he's obviously not a fan of Preacher! Watch the pair battle it out (and get shocked) above, then remind yourself of the sweet way Dominic had a hand in James's marriage.