Robert Downey Jr. joins Captain America 3 cast

Actor Robert Downey Jr. is reportedly set to reprise his Iron Man role in the upcoming Captain America 3. The Oscar nominee is in final negotiations to bring billionaire Tony Stark and his superhero alter ego to the big screen once again for the third installment of the franchise, reports variety.com. Downey Jr. has recently kept fans guessing to whether there will be a fourth film in the franchise. He has already suited up for The Avengers: Age of Ultron  and The Avengers 3.