Seth Rogen, Jonah Hill, Evan Goldberg, and Michael Cera on the set of Superbad Melissa Moseley/Courtesy of Columbia Pictures

Cera: What was John C. like?
Hill: John C. Reilly is like my favorite actor of all time.
Cera: Mine too. He's like…he's up there.
Hill: He might be my favorite actor ever I think.
Cera: Top 12 actors for sure.
Hill: Top 12? (laughs)
Cera: Top eight. He's one of my top eight actors.

With the buzz spreading on Superbad, Cera and Hill are in the upper echelon of a list of their own. Hill is busy at work on Pure Imagination, a film he is writing for Apatow to produce about a man whose imaginary friend begins playing tricks with him. Cera is also staying in the Apatow business by committing to Year One, a closely guarded comedy of which he'll only reveal that he's playing "Jack Black's friend," a disclosure that Superbad costar Rogen quickly puts into perspective: "Would Jack Black say he's playing Michael Cera's friend?"

Black would probably be stupid not to if he saw the reception Cera received at Comic-Con, where in front of the convention center's capacity crowd two female fans separately offered to have his children.. (Apatow, who moderated the panel, thankfully diffused the hotel room propositions by referring them to Charlyne Yi, Cera's girlfriend and fellow panelist who is best known as the stammering pothead in Knocked Up.)

Hook-up offers aside, Cera and Hill have proven that they deserve every inch of those gigantic billboards. And the rest of the world is next.

"Our motto during this was FUBU," Cera says with a smile, invoking the street-cred–craving nature of the characters in Superbad.

"It was for us by us," laughs Hill.

"For us, by us," concurs Cera. "Whatever we are, we're not going to label ourselves."

Perhaps, but soon others will certainly tag them as two of the funniest guys around.