Alec Baldwin and wife Hilaria are now proud parents to their second child Rafael Thomas

Actor Alec Baldwin and his wife Hilaria Baldwin have welcomed their second child, Rafael Thomas Baldwin.

The actor's 31-year-old yoga instructor wife announced the birth of their son on Instagram, by posting an image of the baby's tiny hand on the photo-sharing website.

She captioned the photograph: "We are happy to announce the birth of Rafael Thomas Baldwin."

The birth comes 22 months after the couple, who tied the knot in 2012, welcomed their first child, a daughter named Carmen.

Hilaria documented her second pregnancy by posting images of her growing bump on the photo-sharing website and keeping fans updated on her progress.