Kristen Stewart and Robert Pattinson are Hollywood's highest grossing romantic film couple.

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Kristen Stewart and Robert Pattinson are Hollywood's highest grossing romantic film couple.(Getty Images)

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The duo's involvement in "The Twilight Saga" made them grab the the top spot in Forbes' top 10 list, reports contactmusic.com.(Getty Images)

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"There is something unique about these films in the way that people have attached themselves to them," said Dorothy Pomerantz of Forbes.com.(Getty Images)

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"The movies are unconventional, and you have the added element that the two people are a couple in real life," she added.(Getty Images)

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Channing Tatum and Rachel McAdams with their film, "The Vow", came at the second spot, while Jennifer Aniston and Adam Sandler captured the number three position with "Just Go With It" (Getty Images)