You can tell
Jon Hamm hasn't been at it long - he looks like he just got caught pinching stationary.
Leonardo needs to give him some pointers on how to look suave in front of a camera. Okay, that's not really suave - it's more smug. Wow, where did the hot go Leo? You're fading fast. Now get the hell out of the shot - there's a real man we all want to look at. Don Fucking Draper. Yeah baby.