Piers Morgan expecting fourth child

(CBS) -- Piers Morgan is adding to his expanding brood - a fourth child is on the way.

The British talk show host and "America's Got Talent" judge confirmed via Twitter on Sunday that his wife, Celia Walden, is four months pregnant.

Pictures: Piers Morgan
Pictures: Celebrity baby bumps

"This is true," he tweeted before a Daily Mail link which reported on the pregnancy.

The new arrival will be the couple's first child together and will join Morgan's three sons from his previous marriage: Spencer, 17, Stanley, 13, and Albert, 10.

Morgan, 46, and Walden, 34, a feature writer and columnist for the UK's Daily Telgraph, tied the knot last June in a quiet ceremony in Oxfordshire, southeast England.