The Dark Knight Rises star and his wife Charlotte Riley announced the news on Thursday (03Sep15) on the red carpet at the London premiere of his new Kray brothers biopic Legend, as the actress showed off her growing baby bump in a fitted black dress.

The fiercely-private couple, which met while filming a TV adaption of Wuthering Heights in 2009, wed in secret last year (14).

The baby will be Hardy's second - he is already a dad to son Louis from a previous relationship with Rachel Speed.