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When Milo Ventimiglia's character, Jack Pearson, , the fans approached him asking for a hug, so that they could cope with his heartbreaking death scene. But his costar, Justin Hartley, said he's had a fan go way beyond just wanting a hug — and it crossed the line into sexual harassment.

"I’m not afraid to say this, because I think she should be ashamed of herself," Hartley told GoodHousekeeping.com at a Morningstar Farms event in New York.

Hartley, who plays Kevin Pearson on the hit NBC show, recalled a moment when an overly aggressive fan approached him at a restaurant in Chicago. He was hanging out with a group of close friends when the fan interrupted them. Hartley couldn't recall exactly what the woman looked like, but says that she was "old enough to be drinking a lot."

"This woman – who I don’t know, a stranger to me – recognized me and started screaming; going crazy," he said. "She ran over and started kissing me."

He claims he immediately backed away and told the unnamed woman to do the same. He then asked her to take yet another step back, just to make it abundantly clear that his personal space had just been violated.

The actor then decided to use the uncomfortable moment as an opportunity to teach the woman a lesson about consent.

"I said, ‘You do not walk up to people that you do not know and put your mouth on their face. If I did that to you, I would be in prison. Please do not do that. And not that I’m trying to teach you life lessons, but I feel like this is a really good one for you. Don’t do that to anybody ever again," Hartley says.

After he dismissed the woman's advances, Hartley says she seemed embarrassed and they decided to smooth things over.

"We had a little breaking of bread, if you will, and everything calmed down," he says.

[pullquote align='center']"I’m not taking photos with you after you sexually harassed me."[/pullquote]

Hartley says he then continued his meal as usual with his friends, but that wasn't the end of his ordeal. The woman approached him again, and this time she wanted a photo with him. He wasn't too keen on the idea.

"I said, ‘I’m good,'" he told Good Housekeeping. "I’m usually really good with photos, but I’m, like, ‘I’m not taking photos with you after you sexually harassed me. I’m good without a photo.’"

The woman, according to Hartley, really wanted a photo and did not take him saying no well at all.

"As she was leaving, she was, like, ‘Justin Hartley is a jerk,’ but not really jerk – something more foul," he says. "I was, like, ‘You’ve got to be kidding me.’"