Scroll down for video

A cast Iron fortune: Robert Downey Jr named highest paid actor for second year in a row, pictured in January in New York

His Iron Man alter ego Tony Stark is a billionaire as well as a superhero, and the actor appears to be fast following in the footsteps of the character that won him his fortune.

The earnings are mostly due to his portrayal of Iron Man in a series of Marvel superhero films, including the Avengers.

Downey has become indispensable to the entire Marvel superhero franchise, and is a huge box office draw for both the Iron Man movies and the Avengers.

The hero who made his fortune: The actor has been making millions off his Iron Man movies

Man of the hour: The star has won acclaim for his smaller projects as well as his blockbusters, pictured with wife Susan in Los Angeles in November

Also topping the list, coming in second, is Dwayne Johnson with an estimated $52 million in earnings last year.

Johnson, also known as ‘The Rock’, made most of that money off of franchises like The Fast & Furious but he is now headlining his first blockbuster feature this summer with Hercules.

Coming up third on the list is Bradley Cooper with a mixture of critically acclaimed films and blockbuster comedies, garnering him an estimated $46million.

Number two: Dwayne Johnson earned a $52million last year, pictured in Los Angeles at the ESPY Awards

In fact, the 39-year-old not only made millions off of The Hangover instalment last year, but also a percentage off of American Hustle which pulled in over $251million at the box office.

Fourth on the list is Leonardo DiCaprio, who earned an estimated $39million with films such as The Great Gatsby and The Wolf Of Wall Street.

Ranking fifth is newcomer Chris Hemsworth with a whopping $37million, mostly due to his god-like turn as Thor in both his own star vehicles and the Avengers film.

Number four: Leonardo DiCaprio garnered $39million last year, pictured in London in February