
Peter Finch – Network
He won posthumously, becoming the first actor to receive an Oscar after his death, so he was obviously not present.

Spencer Tracy – Guess Who’s Coming to Dinner
Nominated posthumously, he was not present when honoured, and the moment was marked by tribute instead.

Vivien Leigh – A Streetcar Named Desire
She was not present to collect her award in person and never gave an explanation why she didn’t attend.

Woody Allen – Annie Hall
He skipped the ceremony entirely, choosing to play his regular jazz set instead of attending Hollywood events.

Anthony Hopkins – The Father
He was not present at the ceremony when he won, and the award was accepted on his behalf.

Daniel Day-Lewis – My Left Foot
Known for avoiding publicity, there was speculation around his attendance, though he ultimately accepted the award.