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"Dancing with the Stars" Pro Dating Kate Upton?

Charley Gallay/Getty Images(LOS ANGELES) -- Are things looking "Upton" for Dancing with the Stars pro Maksim Chmerkovskiy?

Chmerkovskiy reportedly has struck up a romance with Sports Illustrated swimsuit model Kate Upton. 

An Us Weekly source claims, "They were set up through friends.  They just started dating."

However, another source who's close to Upton insists that the model, who turned 21 on Monday, and Chmerkovskiy are just friends.

Chmerkovskiy, 33, was once engaged to another Dancing with the Stars pro, Karina Smirnoff.

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