He accepted Hyde 's suggestion of Monroe for a small comedic role in All About Eve as Miss Caswell . Her role was as an aspiring actress , described by another character as a student of `` The Copacabana School of Dramatic Art '' . He accepted Hyde 's suggestion of Monroe for a small comedic role in All About Eve as Miss Caswell , an aspiring actress , described by another character as a student of `` The Copacabana School of Dramatic Art '' .