Diane Keaton is known mostly for her work on the big screen, but songwriter Carole Bayer Sager had the chance to foster another one of the late actress' talents: singing. In an interview with People on Monday, October 13, Sager, 81, opened up about her time collaborating with Keaton - who died at age 79 on Saturday, October 11 - on her first and only solo single, "First Christmas." The song was cowritten with Jonas Myrin and released in November 2024. "I was just playing the song for my husband [Robert A. Daly, Board of Directors Chair at the American Film Institute].