Billy Crystal still thinks about his late father "all the time".
The 76-year-old actor - who has been married to Janice Goldfinger for nearly 55 years and has Jennifer, 51, and 47-year-old Lindsay with her - was just a teenager when he lost his dad Jack to a heart attack in 1963 and is very touched when others who knew him remind him "talk so lovingly" about his dad.