Harry Potter stars Hollywood's top earning couple

Harry Potter stars Emma Watson and Rupert Grint have been named Hollywood's Top Earning On-screen Couple.

The pair who played Hermione Granger and Ron Weasley in the wizard franchise topped the list compiled by Forbes after banking $4.2 billion between them at the global box office in four movies in the series in the last five years.

Twilight actors Robert Pattinson and Kristen Stewart who are dating each other in real life came second after they picked up $2.5 billion from their portrayals of vampire Edward Cullen and human Bella Swan respectively in the saga.

Shia LaBeouf and Megan Fox earned $1.5 billion after they starred as onscreen lovers Sam Witwicky and Mikaela Banes in 'Transformers' and 'Transformers: Revenge of the Fallen', which narrowly beat the actor's onscreen romance with Rosie Huntington-Whiteley in 'Transformers: Dark of the Moon', which pulled in $1.1 billion.

Robert Downey Jr. and Gwyneth Paltrow's portrayals of Tony Stark and Pepper Potts in the 'Iron Man' films saw them claim fourth with $1.2 billion.

Among the other stars who made up the list were Johnny Depp and Penelope Cruz, who earned $1 billion for 'Pirates of the Caribbean: On Stranger Tides', ahead of Orlando Bloom and Keira Knightley's $963 million for their romance in the first three movies of the series.

Forbes list of Hollywood's Top Earning On-Screen Couples:

1. Emma Watson and Rupert Grint, $4.2 billion, 'Harry Potter'

2. Robert Pattinson and Kristen Stewart, $ 2.5 billion, 'Twilight'

3. Shia LaBeouf and Megan Fox, $1.5 billion, 'Transformers'

4. Robert Downey Jr. and Gwyneth Paltrow, $1.2 billion, 'Iron Man'

5. Shia LaBeouf and Rosie Huntington-Whiteley, 'Transformers: Dark of the Moon'

6. Johnny Depp and Penelope Cruz $1 billion, 'Pirates of the Caribbean'

7. Orlando Bloom and Keira Knightley $963 million, 'Pirates of the Caribbean'

8. Tobey Maguire and Kirsten Dunst, $890 million, 'Spider-Man'

9. Leonar! do DiCap rio and Marion Cotillard, $825 million, 'Inception'10. Sarah Jessica Parker and Chris Noth, $703 million, 'Sex in the City'