A very interesting video with The Rock (Dwayne Douglas Johnson) transformation.
Dwayne Douglas Johnson (born May 2, 1972), also known by his ring name The Rock, is an American-Canadian actor, producer, and former professional wrestler. Johnson was a professional wrestler for the World Wrestling Federation (WWF, now WWE) for eight years prior to pursuing an acting career. His films have grossed over $3.5 billion in North America and over $10.5 billion worldwide, making Johnson one of the most successful and highest-grossing box-office stars of all time. – wikipedia