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Meet Archer, a 4-year-old pet Arctic fox who became Vine-famous this week after videos of his contagious laugh amused thousands of users on social media.

The white fox's owner -- 25-year-old Kristina Shafer of Battle Creek, Michigan -- told ABC News today that her little fella starts cracking up whenever he hears laughter, especially loud laughter.

"Archer usually starts giggling whenever my boyfriend laughs," Shafer said, adding that the fox laughs the most when he's sleepy or tired at the end of a day.