Rachel McAdams took the stage at the 2026 Oscars to honor former The Family Stone costar Diane Keaton after her death. "For over 50 years, luminous on screen and indelible in life, believe me when I say there isn't an actress of my generation who is not inspired by and enthralled with her absolute singularity," McAdams, 47, said during the 98th Academy Awards on Sunday, March 15. "She wore so many hats - literally and figuratively - actress, artist, author, activist, but no hat more important to her than being mother to her two children.