Women's Health reported that at age 25, Cobie Smulders was privately battling an ovarian cancer diagnosis while she was working on season 3 of her hit sitcom, How I Met Your Mother.

"I don't think I'll ever feel like I'm cancer-free," she says. "Now that I'm five years out, I'm trying to think of it as a positive thing and what can I learn from it. And if I can create more awareness, I'll do it."

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