Actor Anne Hathaway became the youngest person to host the Oscars when she was 28 years old in 2011. Hathaway, who turned 34 on Saturday, co-hosted the 83rd Academy Awards with actor James Franco. First noticed for her role in the 2001 film 'The Princess Diaries', she won an Oscar for Best Supporting Actress for the 2012 film 'Les Misérables'.