Multiple choice general knowledge Oscar Winner for Best Actor 2008 Brad Pitt - The Curious Case of Benjamin Button as Benjamin Button Sean Penn - Milk as Harvey Milk Frank Langella - Frost/Nixon as Richard Nixon Richard Jenkins - The Visitor as Walter Vale Reveal answer Fill a bubble to check yourself B Correct answer Explanation Sean Penn won the Oscar for Best Actor in 2009 (81st Academy Awards) for his portrayal of Harvey Milk in Milk. This was Penn's second Best Actor win, following his 2004 win for Mystic River.