Celia Walden and Piers Morgan
06/05/2011 at 05:00 PM EDT
Piers Morgan is expanding his family.
The Piers Morgan Tonight
host, 46, confirmed the addition via Twitter
Sunday morning, linking to a report and remarking, "This is true."
The news? Wife Celia Walden, 34, is four months pregnant with the couple's first child together. A feature writer and columnist for the U.K.'s Daily Telegraph
, Walden wed Morgan in June 2010.
Morgan, who also judges America's Got Talent
, is already dad to three boys – Spencer, 17, Stanley, 13, and Albert, 10 – from his previous marriage.