St Kilda star and friend of the show Cal Wilkie chose to stick around for Billy’s joke this arvo.
After copping another St Kilda driveby as an entree, he got around the main course!
WILKIE JUDGES THE JOKE:
“Two nuns are driving between convents…”
Follow @triplemrushhour to watch all of Billy’s jokes on Instagram.
Catch the best bits of the Rush Hour on the LiSTNR app! Download it here.