'Harry Potter's' Emma Watson and Rupert Grint No. 1 on List of Top-Earning On-Screen Couples

Harry Potter actors Rupert Grint and Emma Watson top the list for Hollywood's top-earning on-screen couples, with four movies released in the past five years earning $4.2 billion at the box office, Forbes reports.

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Forbes used data from Box Office Mojo to count box office earnings for actors and actresses who appeared as romantic couples in movies in the past five years.

In a distant second on the list is Twilight's Kristen Stewart and Robert Pattinson, who play Bella and Edward in the big-screen franchise. Their box office intake in the last half-decade is $2.5 billion worldwide. With the final movie, Breaking Dawn Part 2, yet to be released, the on-screen duo have a shot at drastically boosting their box office total.

At No. 3 is Transformers' Shia LaBeouf and Megan Fox, who appeared in the first two movies together, raking in $1.5 billion. Fox was replaced in the most recent film, Dark of the Moon, with Rosie Huntington-Whitely, which did not count toward their box office total.

Fourth went to Iron Man's Robert Downey Jr. and Gwyneth Paltrow, who star as Tony Stark and girlfriend Pepper Potts. The first two Iron Man films made $1.2 billion at the box office.

The fifth slot went to LaBeouf and Huntington-Whitely with $1.1 billion. Rounding out the top 10: Johnny Depp and Penelope Cruz (Pirates of the Caribbean: On Stranger Tides, $1 billion), Orlando Bloom and Keira Knightley (Pirates of the Caribbean, $963 million), Tobey Maguire and Kirsten Dunst (Spider-Man, $890 million), Leonardo DiCaprio and Marion Cotillard (Inception, $825 million) and Sarah Jessica Parker and Chris Noth (Sex and the City, $703 million).