 Reportedly, the role of Robin was narrowed down to two finalists:  Chris ODonnell (I) (qv) and Leonardo DiCaprio (qv). In order to  decide who should get the role, the producers went to a comic book  convention and asked groups of 11 year old boys (the target audience  of the film) who would win a fight between the two actors. ODonnell  was overwhelmingly chosen by the boys as the winner of the fight and  ultimately he won the role.