Brad Pitt and Megan Fox top sex lists

The Hollywood stars were voted into the top spot after couples were asked which celebrities their partners would let them sleep with without classing it as cheating, known as a 'list'.

Joining Brad on the 'allowed' list for women were 'Alice in Wonderland' actor Johnny Depp, '300' star Gerard Butler, soccer ace David Beckham and 'Twilight Saga' hunk Robert Pattinson.

Male respondents opted for Brad's ex-wife Jennifer Aniston and his current partner Angelina Jolie, who were named second and fifth respectively, with Beyonce Knowles and Jessica Alba taking third and fourth place respectively.

Mark Pearson, Managing Director of Groupola.com, which conducted the survey of 1,198 couples, said: "I think that having a 'list' in a relationship is fine, as long as they are taken in jest and feelings aren't hurt.

"Although, I do wonder if any of the respondents would ever actually follow through with their 'list'. I can't help but think that even if people were confronted with the situation whilst in a serious relationship, they would probably shy away from it!"

Top 10 celebrities people's partners would allow them to sleep with without classing it as cheating:

Female stars

1. Megan Fox

2. Jennifer Aniston

3. Beyonce Knowles

4. Jessica Alba

5. Angelina Jolie

6. Cheryl Cole

7. Katy Perry

8. Nicole Scherzinger

9. Christina Aguilera

10. Rihanna

Male stars:

1. Brad Pitt

2. Johnny Depp

3. Gerard Butler

4. David Beckham

5. Robert Pattinson

6. Ashton Kutcher

7. George Clooney

8. Justin Timberlake

9. Will Smith

10. Hugh Jackman