Cupid's arrow struck Lauren Conrad on Valentine's Day.

The Paper Crown designer, 26, hit it off with University of Southern California law student William Tell, 32, on Valentine's Day, a source recently told Us Weekly. Set up by friends on a double date, "they really connected," a pal explains.

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The couple's chemistry isn't surprising to those who know them. Tell -- who hails from Conrad's home turf of Orange County, Calif., and is an ex-guitarist for alternative band Something Corporate -- "gravitates toward dynamic women," according to The Bachelor runner-up Sadie Murray, who dated Tell from 2009 to 2010. (He also dated Hairspray's Brittany Snow, 26, about three years ago.

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"He doesn't date just to date," Murray told Us. "He's either deeply in love or he's on to the next thing. . . He's the kind of guy you marry."

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And for Conrad, who split with Kyle Howard, 34, last June, the timing couldn't be better. Said a pal: "She hopes he's The One!"

This article originally appeared on Lauren Conrad Hopes New Boyfriend William Tell Is "The One!"