United Kingdom, Jan. 5 -- Will Kopelman has become a dad for a fourth time.

The 47-year-old actor and his wife, Alexandra Michler - who already have a two-year-old son called John - quietly welcomed their second son, Hugh 'Hughie', into the world, and announced his arrival via Instagram on Monday (05.01.26).

Alexandra posted a photo carousel, which included sweet shots of the newborn with his parents, John, as well as his sisters, Olive, 13, and 11-year-old Frankie - whom Will has with his ex-wife, actress Drew Barrymore.

Alexandra - the director of fashion development for Vogue - captioned the upload with: "Hugh Radcliffe Kopelman. 'Hughie'. 7 lbs 12 oz. So grateful for our little blessing. Wishing everyone health and happiness for 20...