The actor's family ambitions however, will have to be put on hold as he is set to star in John Le Carre's Tinker Tailor Soldier Spy with Colin Firth later this year.
Firth spoke to journalists after the film's first screening, joined by the film's lead Gary Oldman - who plays George Smiley - and actors John Hurt, Benedict Cumberbatch and Mark Strong.
Cast: Benedict Cumberbatch, Ciaran Hinds, Colin Firth, David Dencik, Gary Oldman, John Hurt, Kathy Burke, Mark Strong, Simon McBurney, Toby Jones, Tom hardy.