Reese Witherspoon is honoring Diane Keaton. The Legally Blonde star got emotional during an appearance at her company Hello Sunshine's Shine Away event in LA on Saturday while addressing the news of Diane's death. Fighting back tears, she told attendees: "I'm going to try and get through this without tearing up, but I don't know if you guys heard that Diane Keaton passed today. Diane was really important, she was one of my first mentors in this business." Related: Diane Keaton 'Lost So Much Weight' In Weeks Before Death, Says Friend Awww.