We all know that Dwayne 'The Rock' Johnson is in pretty good knick, but what's his secret? Milk, apparently. 

Well, we can only assume that milk might be a small part of it, along with clean eating and several gym sessions a day where you seriously bust your chops. However, if this video is to be believed, a quick gallon or two of the white stuff can turn you from an average Joe in to a musclebound Adonis.

Is it an ad for milk, or an ad for Facundo? We just don't know. Either way, we'd love a tall glass of milk right now...