Actor and wife are thrilled with the news
The couple, who tied the knot in July, threw a baby shower in LA at the weekend to celebrate.
Jonny, 35, married actress Angelina Jolie, 33, in 1996 – but the union only lasted a year.
She now has six kids with partner Brad Pitt, 44.
SEE GALLERY: Angelina Jolie throughout her pregnancy>>