Robert Downey Jr. may be relatively new to Twitter, but he's taken to it like a duck to water as he's made fans happy by tweeting a photo from the set of 'The Avengers 2.' Downey has a penchant for charming self promotion that would put even Tony Stark to shame.

'The Avengers: Age of Ultron' is currently filming and will arrive in theaters on May 1, 2015. Downey will once again be joined by Chris Evans, Scarlett Johansson, Chris Hemsworth, Mark Ruffalo and Jeremy Renner, with the likes of Paul Bettany, Elizabeth Olsen and Aaron Johnson joining the ensemble.

For more information on Iron Man in 'Avengers 2,' watch our video of Robert Downey Jr. from Comic-Con 2014.