Katie Cassidy paid tribute to her late father, David Cassidy, with a heartbreaking post on Friday that revealed his last words to her. The Arrow actress, 30, who reportedly had a turbulent relationship with her dad, took to Twitter to thank fans for their outpouring of support. "Words cant express the solace our family?s received from all the love & support during this trying time. My father?s last words were ?So much wasted time?. She wrote. Cassidy continued with "This will be a daily reminder for me to share my gratitude with those I love." The former Partridge Family star died on Tuesday, November 21, a few days after being admitted to a Florida hospital with organ failure. He was 67.