Emma Stone will always be grateful for the life lesson she learned from Diane Keaton. The 37-year-old actress opened up about her late "hero" in an interview for W Magazine's Best Performances Issue 2026 last week. As you may recall, Diane unexpectedly died from pneumonia at the age of 79 back in October. Her death came as a shock and broke the hearts of many fans and her peers, including Emma. In fact, Stone is "such a diehard fan" of Keaton's, so her death hit really hard for the Oscar winner, it sounds like.