Colin Firth is set to star in a sequel to The King's Speech.

The star won a best actor Oscar for his role as stammering British monarch George VI in the 2010 movie. His co-star Helena Bonham Carter, who played George's wife Queen Elizabeth, is also believed to be interested in reprising her role.

The sequel will apparently take place during World War II and will focus on how different families were affected, rather than on George's famous speech impediment.

"The sequel is going to be about the experience of families during the Blitz. It will focus on how the privileged royal family was hit by the crisis, compared to the more ordinary family of George VI's speech therapist," a source told British newspaper The Sun. "The focus will be on George but it will also show how the whole royal household was affected. There's still amazing interest in the Blitz. The movie is still in the very early stages but everyone's keen to get going soon."

Director Tom Hooper who picked up the best director Oscar for the film is believed to be interested in helming the follow-up.

The King's Speech also won best screenplay and best picture at the Academy Awards.