Mark Wahlberg Shares Hilarious Head Shave Flashback ... he committed to the character by shaving his head rather than wearing a bald cap.

Mark Wahlberg is known for his early wakeup times. The longtime Hollywood star, known for his roles in movies like "The Italian Job" and "Lone Survivor," famously gets up really, really early.

Mark Wahlberg is beefing up. The actor updated fans on his fitness ... he committed to the character by shaving his head rather than wearing a bald cap.