Justin Bieber is reportedly keen to work in action films and he is taking actor-producer Mark Wahlberg\'s help to fulfil his dream. \"Justin really wants to break into movies but he wants to do a project of his own. He loves action movies and is a huge fan of Mark and sees him as very much the kind of actor he wants to be — especially as Mark started out in pop,\" showbizspy.com quoted a source as saying. \"Unfortunately, Justin hasn\'t quite got the physique for an action movie just yet. He\'s working out with a personal trainer but the fitter he gets, the skinnier he ends up,\" the source added.