Chace Crawford’s clan is crazy about Carrie Underwood.

“His whole family loves her,” a friend of the couple tells the latest issue of Us Weekly, on newsstands now. “They are really perfect for each other.”

How close are the duo of six months (who started dating in July but didn’t go public until October)? After the American Idol winner, 24, spent Thanksgiving with the Gossip Girls hottie, 22, at his parents’ home in Dallas, she joined his relatives on part of her Christmas vacation as well, Us confirms. “They spent Christmas together and had a wonderful time,” a source says.

“His parents are fond of her and think she’s extremely talented,” an insider tells Us. “And they believe ‘Carrie Crawford’ would be a great addition to the family!”

Underwood, meanwhile, has no regrets about her July split from Tony Romo. “She thanks her lucky stars she isn’t with Tony anymore!” adds a source. “She thinks it’s a joke he’s with Jessica Simpson and sees him as a player. Carrie and Chace call him ‘the player’ and Jessica ‘the ditz.’”

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