The Superbad actor admits it was a dream come true to work with director Harold Ramis - who starred in the first two spooky movies - in new film Youth In Revolt.
And he used his time on set to grill Ramis, who played nerdy Egon Spengler, about the ghoulish franchise and plans for a forthcoming sequel featuring the original cast and a new generation of Ghostbusters.
Cera tells People magazine, "(I loved) Ghostbusters. As a kid, I wanted to be Bill Murray's character.
"Harold told me lots of stories and I memorised every word."
Ghostbusters III is scheduled for release in 2012.