Olivia Wilde reveals nipples were digitally added in sex scene

 Actress Olivia Wilde has revealed that she was not actually nude in an upcoming sex scene for movie `Cowboys and Aliens`, but her nipples were digitally added to make her look so.

Wilde, 27, revealed in an interview on the Jimmy Kimmel Live show that she wore pasties to cover her nipples and preserver her modesty, but due to a staging glitch, they were clearly visible in the scene.

"I appeared to be naked ... because they CGI`d me naked," Fox News quoted her as saying.

To preserve the scene`s authenticity, the producers digitally overwrote them with artificial ones.

"In that scene Ryan Reynolds is supposed to be covering them and he moved and so the pasties were in the movie and so they had to paint in nipples using CGI," Wilde said.

"And I got to approve the nipples! They sent me an email saying, ``Please review nipple cover shot one through seven and decide which one is most like the original``.

"I don`t know what the producer was using as source material... but I think it`s pretty close," she added.