Stars' not-so-sexy experiences!

Here are some 'sex scene' moments that stars find difficult and awkward to shoot.. Kate Winslet freaked out during her sex scene in 'Revolutionary Road' with actor Leonardo, as her husband and director of the film Sam Mendes was watching it. (Pic. courtesy: Paramount Films)

Harry Potter star Rupert Grint found his sex scene in 'Cherrybomb' with co-star Kimberley Nixon a bit traumatic. (AGENCIES)

Actor James Franco said his outgoing co-star actress Julia Roberts in 'Eat, Pray, Love' was very shy about doing a sex scene. (AGENCIES)

'Twilight' star Robert Pattinson also found a sex scene in movie 'Remember Me' with co-star Emilie de Ravin pretty awkward.

Justin Bartha was a bit worried for the filming of the sex scenes for the film 'The Rebound'. On the other hand Catherine Zeta Jones was a bit nervious too. (AGENCIES)

Stephen Moyer and Anna Paquin, the real-life couple had no trouble getting set for the saucy scenes in 'True Blood'.  (AGENCIES)

Eva Mendes was embarrassed while filming sex scenes with Joaquin Phoenix for the movie 'We Own The Night.'  (AGENCIES)

Actor John C. Reilly was left red-faced on the set of 'The Good Girl' when he had to simulate sex with a clearly uncomfortable Jennifer Aniston. (AGENCIES)

Actors Kate Bosworth and Jim Sturgess couldn't find any other way but to get 'high' for the filming of the sex scene for the movie '21'. (AGENCIES)

While filming the sex scenes for 'MacGruber' Kristen Wiig too faced some serious awkard situations with Will Forte. (AGENCIES)

During the shooting of the movie 'Saat Khoon Maaf' Priyanka had to pull all her skills to make Neil Nitin Mukesh comfortable while doing some love-making scenes.