Instagram/Diane Keaton & Rachel McA Movie Rachel McAdams honors the late Diane Keaton in a moving Oscars tribute. Remembering the iconic actress, mother, and friend. March 17, 2026 AceShowbiz - At the 98th Academy Awards held on Sunday, March 15, 2026, Rachel McAdams took a heartfelt moment to honor the late Diane Keaton, her former co-star and close friend. The tribute came after Keaton's passing in October 2025 due to bacterial pneumonia at the age of 79. Speaking from the Dolby Theatre in Los Angeles, McAdams, 47, praised Keaton's remarkable career and multifaceted life.