Amanda Seyfried used a popsicle when pretending to give Peter Sarsgaard oral sex.

The blonde actress had to film the raunchy scenes with the actor in movie 'Lovelace' - a biopic of infamous porn actress Linda Lovelace - and in order to make the sexual acts look convincing, she decided to use the icy treat as a prop.

She said: ''We were doing a sex scene where I was supposed to be going down on Peter Sarsgaard. We used a popsicle, and I had my arms covering the popsicle. It was footage that he was going to show the 'Deep Throat' guy, to get her into the movie, to get her cast. I was laughing hysterically throughout. I couldn't stop laughing.''

Amanda also says she's become more realistic as her career goes on as she knows Hollywood is a tough place to work in.

Speaking about her first big movie, 'Mean Girls', she told Vanity Fair magazine: ''Back then I thought every movie that was made found an audience and things were all stars and butterflies, before I developed a relationship with this world.''