The Possession star recently wrapped Story of a Girl after snapping up the rights to Sara Zarr's young adult novel in 2007, and she admits making the movie, which will debut on U.S. cable channel Lifetime in 2017, was more fun than she could ever have imagined.

"I'm very excited about it," she tells WENN. "It was like a revelation of amazingness. That's all I wanna do. I'm desperate to find something else. It was the greatest thing ever. It was one of the most creatively fulfilling things I've ever done in my life. I'm completely smitten. I'm madly in love with directing.

"That was an unbelievable thing, at 51, to direct your first movie. I always said I would never, never direct. I always wanted to get it made as a producer and a situation presented itself where I could actually do it."

But her debut is a little dark - it's about a 13-year-old girl who films a sex tape with her older brother's best friend and then has to deal with the fall-out when it goes viral.

"It's dark and a cautionary tale," Kyra adds. "It's actually a young adult novel that I bought in 2007 and finally got it made this year. I thought, 'This is the story I want to tell'."

She shot the film in September (16) in Vancouver, Canada and cast her actor husband Kevin Bacon. Sedgwick was tapped to direct the film as part of Lifetime's Broad Focus initiative to provide women with more opportunities to write, direct and produce content.