Multiple choice general knowledge Oscar Winner for Best Actor 2006 Will Smith - The Pursuit of Happyness as Chris Gardner Leonardo DiCaprio - Blood Diamond as Danny Archer Peter O'Toole - Venus as Maurice Forest Whitaker - The Last King of Scotland as Idi Amin Reveal answer Fill a bubble to check yourself D Correct answer Explanation Forest Whitaker won the Oscar for Best Actor in 2007 (79th Academy Awards) for his portrayal of Idi Amin in The Last King of Scotland. His transformation into the Ugandan dictator was critically acclaimed.