HOLLYWOOD, Calif. — Johnny Knoxville received an early Christmas present over the weekend.

The 38-year-old Jackass star and his girlfriend, Naomi Nelson, welcomed a baby boy Sunday night, the Los Angeles Times reports.

The couple's son, Rocko Akira Clapp, weighed in at eight pounds and measured 20 inches long.

This is the first child for Knoxville and Nelson, who started dating last year.

Knoxville also has a 13-year-old daughter, Madison, with his ex-wife, Melanie Lynn Clapp.