Denise Richards and Charlie Sheen's oldest daughter, Sami Sheen, paid tribute to her mom's ex, Patrick Muldoon, after his death at age 57.

Actor and producer Patrick Muldoon, well known for his roles in “Days of Our Lives,” “Melrose Place” and “Starship Troopers,” has died after suffering a fatal heart attack on Sunday.

“I thought you were the one that was supposed be in our lives forever,” she wrote.