Knoxville, girlfriend to marry today?

Johnny Knoxville is reportedly planning to marry his long-time girlfriend Naomi Nelson in a private ceremony today.

A source close to the couple confirmed to Life & Style that Nelson picked out her wedding ring on Wednesday at LA's Platt Boutique Jewellery.

"They actually picked out Naomi's engagement ring two days ago and they're getting married today," the insider said.

The source further described Nelson's wedding band as a "2.5 carat Edwardian engagement ring".

The couple met nearly two years ago and had their first child Rocko in December 2009.