Christie Brinkley, from top left, and her then-husband Peter Cook, pose with their children, son Jack Paris and daughter Sailor Lee, at the Condé Nast Traveler Readers' Choice Awards at Jazz at ...

"It was my failing," Peter Cook told Barbara Walters in an exclusive interview. "I was a great father, a great husband, and I failed as a human being. I failed myself.

Christie Brinkley is opening up about her on turbulent marriages with Billy Joel and Peter Cook, recalling Joel's drinking habits and how it led to their divorce. Plus, she details how she found ...