Wallace And Gromit, Cheech & Chong, "Glee" Cast to Appear on "The Simpsons"

The LA Times has reported Wallace and Gromit will guest star on The Simpsons, as well as the entire cast of Glee, Facebook creator Mark Zuckerberg, Cheech and Chong, and Hugh Laurie.

When asked how much longer he thinks The Simpsons will last, showrunner Al Jean replied, “Really, there is no end in sight.”

As for talks of a spin-off show (like “The Cleveland Show” the emerged from "Family Guy") or another feature film, the crew didn’t rule it out. They also took the opportunity to take a jab at their Sunday night competition.

“Come on, Seth MacFarlane does one show three times,” executive producer Matt Selman joked before later adding, “Those shows are all really funny -- they deserve to exist … why can’t I be genuine?”