By Kate Ward
Updated July 14, 2010 at 08:54 PM EDT

Late Late Show host Craig Ferguson and wife Megan Wallace will welcome their first child this winter, People reports. “Holy crackers! Mrs F is pregnant. How did that happen?” Ferguson Tweeted. “Oh yea I know how. Anotehr Ferguson arrives in 2011. The world trembles.” Ferguson has another son, 9-year-old Milo Hamish, from a previous marriage. Ferguson and Wallace have been married since 2008.