THE FONZ is to be porn again in a new X-rated Happy Days movie.

The hit 70s comedy which starred Henry Winkler as the leather jacket biker and film director Ron Howard as Richie Cunningham is to get the porn treatment from Hustler video bosses.

It Ain’t Happy Days XXX will turn the family show set in 50s Milwaukee around Arnold’s diner into a flesh fiesta.

It’s reported that Alan Stafford and Tommy Gunn will play Richie Cunningham and The Fonz.

Hustler has already made porn versions of TV shows The Munsters, The Brady Bunch and Gilligan’s Island.

The original Happy Days ran from the mid-70s to the mid 80s for 11 seasons.