"Jackass" star Johnny Knoxville and his wife, Melanie, have split after nearly 12 years of marriage. The couple have been married since 1995 and have one daughter, Madison, 10. Knoxville's representative Amanda Silverman confirms the split to Us Weekly saying, "They have been separated." The star was rumored to be romantically involved with "The Dukes of Hazzard" co-star Jessica Simpson, although both parties have denied it. A source claims the rumors of Knoxville's infidelity hurt the relationship saying, "How do you live knowing that your husband leads a separate life ... and is sleeping with other women all the time? "She deserves every penny if she is going to divorce him." Another source close to the couple adds, "They have been separated for a while. They just grew apart."