Chris Denman, 20, faces up to life in prison after entering the plea. He is due in court Dec. 12 for sentencing.
Denman was accused in August of raping the girl on the campus of Victory Christian Center, a megachurch that has 17,000 members. Denman was also charged with molesting a 15-year-old girl and making a lewd proposal to a 12-year-old girl.
He pleaded guilty Monday to all charges filed against him: first-degree rape, forcible oral sodomy of a child, lewd molestation, lewd proposal to a child and two counts of using a computer to facilitate a sex crime.
Attorneys said Denman’s plea was not a result of an agreement with prosecutors, who plan to call an "aggravation hearing" at his sentencing to demonstrate the need for a tough sentence.
Denman told a judge at Monday’s hearing that he made the decision on his own to accept the plea deal.
Prosecutors and defense attorneys weren’t immediately available for comment.
Five employees of the church also face misdemeanor charges for allegedly waiting two weeks to report the alleged rape. They have pleaded not guilty and are due in court Wednesday.
The 13-year-old’s mother has sued the church seeking more than $75,000. She claims the church sought "damage control" rather than pursuing the case properly.