Mark Ruffalo is reportedly putting his faith in Robert Downey Jr. as far as his appearance in “Captain America: Civil War” is concerned. After revealing to the Daily Beast that Downey assured him he would appear in the film, Ruffalo told Hit Fix that if Downey says he is in the film, then he will be in it.

“If Robert Downey Jr. says I'm in 'Captain America,' I'm in 'Captain America'," Ruffalo said. "And I will wait for the day that my call sheet shows up at my doorstep, or my script. At this point, I'm told that I'm in it by Robert, which I'll take as biblical, but I just haven't heard or seen from production yet."

Ruffalo, a two-time Academy Award nominee, was first seen in the role of Hulk/Dr. Bruce Banner in the 2012 film “The Avengers.” He recently reprised the role in the “Avengers: Age of Ultron,” in which he was shown battling with Iron Man/Tony Stark (Downey) after getting manipulated at the hands of Scarlett Witch/Wanda Maximoff (Elizabeth Olsen). If Ruffalo’s Hulk appears in “Captain America: Civil War,” then it will be interesting to see whose side he will be on -- that of Captain America/Steve Rogers (Chris Evans) or of Iron Man/Tony Stark.

“Captain America: Civil War” is being shot in metro Atlanta and will open May 6, 2016 in 3D and Imax. Other cast members include Scarlett Johansson, Sebastian Stan, Anthony Mackie, Paul Bettany, Jeremy Renner, Don Cheadle and Paul Rudd.

Meanwhile, Ruffalo will soon play a manic-depressive father in the upcoming American comedy “Infinitely Polar Bear.” His character tries to win his wife back by attempting to take full responsibility of their two daughters. The film opens Friday. The actor will also be seen in Thomas McCarthy’s film “Spotlight” and “Now You See Me: The Second Act.”