Robert Downey Jr.'s Iron Man is one of the most iconic movie castings of all time, thanks in no small part to the superstar actor's skill with improvisation. The flagship character of the Marvel ...

Stephen Gaghan's 2020 film "Dolittle," based on Hugh Lofting's "Doctor Dolittle" novels published in the 1920s and 1930s, was notable in that it was Robert Downey Jr.'s first major acting job in ...