Mark Wahlberg's 4am workouts are the stuff of legend, but we're about to get an inside peek at what happens during his early morning gym sessions. The actor has announced he's bringing "4AM Club Challenge" to YouTube. The ten-part series will see Wahlberg putting some of the world’s biggest digital creators through his famous workout routine at his home gym. Guests for the first season include Brent Rivera, Druski, The Stokes Twins, Adam W, Jesse James West, Hannah Stocking, Ben Azelart, Dhar Mann, Pierson and Airrack. "4AM Club Challenge" will premiere this morning at 7am PT on Wahlberg’s new YouTube channel. See the trailer for the series below...