Piers Morgan is on diaper duty.

"It's true. I've become a dad for the fourth time to a baby girl called Elise," the 46-year-old CNN host tweeted Friday. "She's absurdly beautiful and utterly adorable."

This is the Brit's first child with wife of 17 months, Celia Walden, 34. Morgan has three sons with his ex-wife Marion Shalloe: Spencer William, Stanley Christopher and Albert Douglas.

Walden, a British columnist, walked down the aisle with Morgan in June 2010 after four years of dating. Morgan recently announced he is leaving America's Got Talent to focus on the upcoming election.

Tell Us: Do you like the name Elise?