Dwayne Johnson show off his body transformation as results of his training as he prepare for scenes for upcoming film "Black Adam"

Hollywood star Dwayne 'The Rock' Johnson, 49, showed off his muscular physique after his training during a late night gym session. It's been gathered that The Rock is preparing for scenes for upcoming film Black Adam. 

Dwayne is to appear in upcoming film Black Adam, set for release in July 2022, a superhero movie based on the DC Comics character of the same name.

He plays the title character, an antihero who was jailed for 5,000 years and is the archenemy of Shazam, sharing his powers from the ancient wizard of the same name.