Craig Ferguson Craig Ferguson

The Late Late Show host Craig Ferguson is expecting his first child with wife Megan Wallace.

Ferguson, 48, took to Twitter on Wednesday to announce the big news. "Holy crackers! Mrs F is pregnant. How did that happen? ... Oh yeah, I know how. Another Ferguson arrives in 2011. The world trembles."

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The late-night host, who married Wallace in December 2008, has a 9-year-old son from a previous marriage.

Reps for Ferguson did not immediately respond to's request for comment.