'Potter' stars named top-earning screen couple
'Twilight' stars place second
Which on-screen couples have helped their films earn the most money at the box office?
Forbes Magazine did the math and found that "Harry Potter's" Emma Watson and Rupert Grint brought in the most money, topping the list with $4.2 billion.
Surprisingly, "Twilight's" Kristen Stewart and Robert Pattinson came in second place. The on-screen couple -- who allegedly are together off-screen as well -- generated $2.5 billion.
Rounding out the top three is Shia LaBoeuf and Megan Fox, who shared the screen together in two "Transformers" films.