Iron Man essential to Avengers movie

Chris Evans says Robert Downey Jr's Iron Man / Tony Stark is the most essential character in 'Marvel Avengers Assemble'.

Source: http://www.femalefirst.co.uk/movies/movie-news/Robert+Downey+Jr-234281.html

Aisha Tyler Aki Ross Alecia Elliott Alessandra Ambrosio Alexis Bledel Ali Campoverdi Ali Larter Alice Dodd