According to Forbes

Valentine’s Day is just around the corner, when movie lovers’ thoughts turn to romance films. Older folks might think of putting on Casablanca; Gen X’ers, Say Anything. What does it say about the millennial generation that the most popular love story of their time involves a young lady, a vampire and a werewolf?

That’s why Kristen Stewart and Robert Pattinson land at the top of our list of Hollywood’s Highest-Grossing Romantic Couples. We looked at the top-grossing romantic movies of the last three years. Twilight was by far the biggest box office winner over that period, earning $1.17 billion.

1# Kristen Stewart and Robert Pattinson

$1.17 billion
Romance is at the center of the Twilight franchise and that lands Kristen Stewart and Robert Pattinson at the top of our list. For this list, we're only looking at domestic box office revenue from the last three years but Twilight has brought in $3.3 billion overall at the global box office.

Pattinson is also a member of the 10th place couple on our list alongside Reese Witherspoon. Their filmWater for Elephants earned $59 million in the U.S. in 2011. Those aren’t Twilight numbers, but considering that the movie brought in an extra $58 million internationally and only cost $38 million to make, it was a small hit.

10 #Reese Witherspoon and Robert Pattinson

$59 million
Water for Elephants didn't do Twilight numbers but it was a small success earning $117 million at the global box office on an estimated budget of $38 million.