William H. Macy was nominated for Best Supporting Actor in “Fargo,” despite having more time on-screen than Best Actress winner Frances McDormand
Going waaaaay back, Barry Fitzgerald was nominated for BOTH awards for his performance in Going My Way. He WON in the Best Supporting Actor category, while co-star Bing Crosby won Best Actor.
After that, rules were changed to make sure actors could only be nominated in one category.