Instagram/Sean Penn & Kieran Culkin Movie Sean Penn wins his third Oscar but skips the 2026 ceremony. Kieran Culkin accepts the Best Supporting Actor award on the absent winner's behalf. March 16, 2026 AceShowbiz - Sean Penn has earned his third Academy Award but was noticeably absent from the 2026 Oscars ceremony at the Dolby Theatre in Los Angeles. Sean Penn won the Oscar for Best Actor in a Supporting Role for his performance in Paul Thomas Anderson's One Battle After Another. Despite his triumph, he was the only nominee in this category who did not attend the event.