Johnny Knoxville has announced via Facebook that his wife, Naomi Nelson, is pregnant with their second child.

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The "Jackass" star said he and his wife are "having another little bambino in the fall," UsMagazine.com reported.

"My 15-year-old daughter Madison is very excited about it," Knoxville wrote on his official Facebook page. "And her 16-month-old little brother Rocko has, well, no clue. Wahoo!"

The couple wed last year. Madison is Knoxville's daughter from a previous marriage.

In addition to starring in the "Jackass" TV show and movies, Knoxville has also acted in "Men in Black II" and "The Dukes of Hazzard."