Sir Peter Ustinov, who earned Best Supporting Actor Oscars for 1960's Spartacus and 1965's Topkapi, died of heart failure late Sunday night. He was 82. The ultimate multitasker, Ustinov also toiled as an author, playwright, director and for more than 30 years served as a goodwill ambassador for UNICEF. More recently, he appeared as the Walrus in NBC's big-budget Alice in Wonderland movie.