The 30-year-old actor co-starred with Depp, 53, in 2013 movie "The Lone Ranger".
"So here's the deal: Yes, the guy lives an extravagant lifestyle. There's no way around it. But he also lives on like an entirely other planet, something I have no idea about. Nobody here has any idea the planet this guy lives on," Hammer says during his appearance on "Watch What Happens Live".
"It was just a crazy world, so when you go to a restaurant, they have to close down part of the restaurant. It sounds extravagant but it's also... Super intense," he adds.