Alberto E. Rodriguez / Getty Images file
Joosten died Saturday morning from lung cancer, and was surrounded by family and friends at the time of her passing, E! News has confirmed.
She was 72.
"Kathryn passed away this morning after a valiant fight against her cancer," Nadine Jolson, Joosten's rep, told E! News. "Her family was with her. Funeral arrangements are pending. This is a terrible loss, and she fought as hard as she could."