'Rock of Ages' is a very popular movie, based on a very popular musical. The musical still tours all over the world to this day, often in large venues. That's despite the fact that the film version - which starred Tom Cruise as a jaded, egotistical rock star - split the crowd when it came to reviews. One of those who had unfavorable things to say about it was Alec Baldwin - which is a bit of an issue, as he was in the film as Dennis Dupree.
Baldwin went into the making of the movie with high hopes that it would be fun. A week into filming, he started to experience regret for ever signing the contract. It started off with a creeping suspicion that the end product was going to be, in his own words, a 'horrible movie.' By the time he was finished shooting, his opinion had deteriorated to the point where he simply called it 'a complete disaster.'