Final answer:
Kate Beckinsale co-starred with Leonardo DiCaprio in the movie 'The Aviator', in which Cate Blanchett played Katherine Hepburn.
Step-by-step explanation:
Cate Blanchett portrayed Katherine Hepburn in the movie The Aviator. The actress who co-starred with Leonardo DiCaprio in "The Aviator" is Kate Beckinsale. Many of the most famous actors in blockbuster movies have dedicated their lives to perfecting their craft, including the likes of Meryl Streep, who graduated from the Yale School of Drama, and Bradley Cooper, who also has formal training in acting.