Lisa Rinna threatened to kill husband Harry Hamlin due to 'horrible' postpartum depression

"Real Housewives of Beverly Hills" star Lisa Rinna threatened to kill husband Harry Hamlin while experiencing postpartum depression after giving birth to her daughter, Amelia.

"I had horrible postpartum depression, but I didn’t know it," the 61-year-old said on an episode of "Let's Not Talk About the Husband." "I didn’t know what it was. When you have your first baby, you don’t know. You just don’t know." "You said, ‘I’m going to kill you.'"

After giving birth to the couple's youngest daughter, Amelia Hamlin, in 2001, the postpartum depression returned. Rinna's second bout of postpartum depression left Hamlin worried after the "Real Housewives of Beverly Hills" star threatened his life.

"You said, ‘I’m going to kill you,'" the actor recalled. "And I said, ‘You better call [your OB-GYN] right now.' … You said, ‘You better watch out. I feel like killing you.’ You said, ‘Keep the knives in the drawer.'"