It's a boy for Johnny Knoxville and girlfriend Naomi Nelson.

The couple welcomed son Rocko Akira Clapp on Sunday night in Los Angeles. The baby weighed in at 8 lbs., and measured 20 inches long. Both mother and son are doing well, reports the Los Angeles Times.

In announcing the pregnancy in August, the actor and former Jackass star, 38 – whose real name is Phillip John Clapp – said he was "excited as hell" to meet his baby-on-the-way.

Rocko joins Madison, Knoxville's 13-year-old daughter from a previous marriage.