Todd Owyoung/NBC via Getty Rudd chewed up scenery on The Tonight Show's makeshift soap opera stage as he dramatically looked out the set's fake windows to answer the question. "It's a secret.

The long-lived soap opera "All My Children" began its over-40-year run in 1970. Photo illustration by Amanda Berlinski; source photo: Steve Fenn / The LIFE Images Collection / Getty Images Long ...