London: Emma Watson and Rupert Grint have been named the highest-paid on-screen couple of the past five years, by Forbes magazine.

Box Office website reports that these two companies have compiled the new list, based on onscreen chemistry and box office success, and 'Harry Potter' co-stars Watson and Grint have raked in USD 4.2 billion over the course of the study.

'Twilight' couple Robert Pattinson and Kristen Stewart came in second with takings of USD 2.5 billion, and original 'Transformers' co-stars -- Shia LaBeouf and Megan Fox - stood third with earnings of USD 1.5 billion.

Rounding the top five are Robert Downey Jr. and Gwyneth Paltrow - thanks to the first two 'Iron Man' films - and LaBeouf and his 'Transformers: Dark of the Moon' love interest Rosie Huntington-Whiteley.

(Agencies)