Kristin Scott Thomas is set to star in a new military film.

Kristin Scott Thomas

Kristin Scott Thomas

The 58-year-old actress has joined the cast of the upcoming flick 'Military Wives' - a movie inspired by the BBC factual series 'The Choir' about the real-life Military Wives choir, set up by Gareth Malone, who performed for the Queen on Remembrance Day 2011 - alongside the likes of Irish actress Sharon Horgan.

Speaking to Variety.com, she said: "This is the kind of film I love to do; it will make people laugh, and cry, touching on the subject of families who are often forgotten."

However, Horgan, 48, wasn't so willing to do the movie as she "can't really sing."

She explained: "I tried to talk them out of giving me this part because I can't really sing. But they just said 'Pierce Brosnan' and so here I am.

"I love Peter [Cattaneo, the director] and I'm a huge, long-term fan of Kristin's. Can't wait to start working with them and telling this story."

Details on their castings are yet to be announced.

The film, which is expected to hit cinema screes at the end of next year, is written by Rosanna Flynn and Rachel Tunnard and directed by Peter Cattaneo.

Cattaneo said: "It's exciting to bring life on a contemporary British Military base on screen through this story of ordinary women in unbelievably testing circumstances, finding courage in the cathartic power of singing together."

Meanwhile, Scott Thomas recently said she has no desire to retire from making movies - despite claiming in 2014 that she was stepping away from her career.

She said: "Despite saying I was retiring, it turns out I like making films.

"Life is about changing your mind. You don't know what's going to happen. I don't know where I'll be next year, and that's OK."