VIDEO : Chris Evans Wishes Robert Downey Jr. A Happy Birthday

Robert Downey Jr. turned 54 this year and Chris Evans took to Twitter to wish him a good birthday. Evans called Downey Jr. ?the myth,? ?the incomparable? and ?the indomitable.? He said: ? You?re a true original. Thank you for carrying us these last 10 years!!!!? Although on screen the two characters don?t seem to get along well, off-screen they seem to be good friends. Downey recently said: "[Evans'] suspension of his own disbelief, regardless of whatever doubts he had, is the reason all these other worlds are able to be built.?