Jackass star Johnny Knoxville is going to be a dad for the second time. His girlfriend of nearly a year, Naomi Nelson, is three months pregnant.Knoxville already has a 13-year-old daughter, Madison, with ex-wife Melanie Clapp. He and Clapp wed in May 1995 and were married for 12 years before separating in July 2006. One year later, Knoxville filed for divorce, citing irreconcilable differences.
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