Johnny Knoxville expecting third child

(CBS) - Johnny Knoxville is going to be a dad for the third time.

The 40-year-old "Jackass" star announced on his Facebook page that he and wife Naomi Nelson are expecting another child together.

Pictures: Celebrity baby bumps

"My wife Naomi and I are super happy to announce that we are having another little bambino in the fall," Knoxville wrote Friday. 

"My 15-year-old daughter Madison is very excited about it, and her 16-month-old little brother Rocko has, well, no clue. wahoo!!"

The new arrival will be the second child for the couple, who married in September 2009.

Knxoville's latest film, "Jackass 3.5," is currently streaming online.