It was Olivia Wilde's first experience in the genre and to work on the set of supernatural horror film "The Lazarus Effect," not to mention she is pregnant.
But nothing scared her more than the sight of her baby bump almost popping out.
The former "House" actress expressed how terrifying and insane being pregnant is during an interview on The Daily Show. She added that it is "a whole other horror movie."
She said that she was doing re-shoots at eight and a half months pregnant, and yet she was just so thrilled to act out her scenes in the movie.
The 30-year-old actress expressed that the camera angles will probably appear awkward since it was not easy to cover up her size.
She said, "The reason it's kind of framed oddly is because there's just this enormous belly."
According to Daily Mail, Wilde finds motherhood to be fun and exciting. She said that thinking about it, it's funny how it changes one's life. "There's no such thing as leisurely brunch anymore," she added.
The actress explained that before she had a son, they used to take brunch for an hour and a half. But with a child, all you will ever do is hold him. "It's a balancing act," she said.
When asked if she has plans on expanding her family, she said that she like the idea of an extended family and that if she will be really proud of herself if she can keep one alive.
Kidding aside, Wilde is very keen on having a larger household with her fiancé. Both of them have two other siblings and they said they want their children to experience that too.