Republican actress Angie Harmon wants people to quit hating on unwed teen mom Bristol Palin.

"I don't care what anybody says, this person is still a young person," she says in a new interview with Fox News. "OK, she's got a big situation on her hands, but for anyone to sit there and make fun of her, or judge her, is just cruel and wrong."

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Harmon says the 18-year-old Palin -- who welcomed son Tripp with then-fiance Levi Johnson, 19, on Dec. 27 -- "is in a position that any girl could be in: Is this guy marrying me because he loves me and wants to be with me?"

Palin and Johnson have since called off their engagement.

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Nowadays, Harmon says, young marriages "don't last. So if everyone could just get off her and let her live her life and do it in a way that she thinks is best, I'm all for it. I really am. She has my support 100 percent. She's a sweetheart."

As mother of three, Harmon says, "I'm going to stand up for [young mothers] and support them in whatever they want to do."

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She also applauds her fellow Republicans for treating Bristol and the Palin family with respect.

"I think one of the greatest things about the Republican party is the understanding," Harmon says. "We don't point fingers and we have class."