Neil Patrick Harris talks shooting 'robotic' Gone Girl sex scene with Rosamund Pike

The gay actor revealed details of the awkward experience to Out magazine

Neil Patrick Harris stars in the movie adaptation of Gone Girl with Rosamund Pike and Ben Affleck

Openly gay actor Neil Patrick Harris has described shooting a 'robotic' sex scene with Rosamund Pike for upcoming movie Gone Girl.

The How I Met Your Mother star shared details of his awkward experience with Out magazine, revealing that his sexuality was "never even thought about".

"We had to rehearse the sex scene with David (Fincher), like every inch of it – 'Then you put your mouth on his d**k here, and then this number of thrusts, and then you ejaculate'," he said.

“It was weird because we’re technically breaking down the sex scene. (Fincher) wanted it to be almost robotic, that we know exactly where we are position-wise, where everything goes. And yet, through all of that, the whole ‘I’m gay’ element was never even thought about.”

Harris continued to discuss his sexuality, emphasising that he still has many female fans.

"I've found that a lot of girls have no issue with me being gay," he said. "They still want to marry me, and I love that."

Based on Gillian Flynn's bestselling thriller and also starring Ben Affleck, Gone Girl is due in cinemas on 3 October.

The plot follows unemployed writer Nick Dunne as he becomes the chief suspect in a possible murder investigation when his wife Amy disappears on their fifth wedding anniversary.

Harris is currently starring as a transgender glam rock singer in Broadway play Hedwig and the Angry Inch, a role he admits is "bringing up a lot of super insecure things" within him.

"I have never thought drag was intoxicating, I've never had a fun drunken Halloween in drag, never been in heels, really," he said.

“I've lived my whole life being attracted by masculinity – it's why I like guys. I’m not a super effete person, and I have to turn into that, and in doing so it brings up a lot of homophobic insecurities within myself."