The period drama was expected to arrive in New York this year because of the movie's critical and commercial success. It will now premiere in Guildford in February, before being staged in five other cities in the UK.
If the play is successful, a West End production could be made, according to Arts Beat. David Seidler, who won an Oscar for 'Best Original Screenplay' for the film, also wrote the stage version.
The King's Speech centres on the attempts of King George VI (Firth) to get over his stammer with the help of speech therapist Lionel Logue, played by Geoffrey Rush.
Theatre stars Charles Edwards and Jonathan Hyde are to take on the two lead roles in the play, under the direction of former Royal Shakespeare Company star Adrian Noble.
Director Tom Hooper previously acknowledged that his author mother "discovered" the film at a fringe reading of unknown, unperformed works.
Watch the trailer for The King's Speech below: