Which Animal House actor wasn’t allowed to sit with the rest of the cast at the premiere?

Somehow, unbelievably, it feels like Animal House doesn't get enough respect nowadays.

The film represented breakouts for multiple young actors and put director John Landis in a deserved spotlight that would allow him to go forward and dominate the '80s.

But more so, it served as the quintessential college comedy, essentially defining the genre. The evil dean hellbent on expelling the ragtag bunch of misfits who just want to party and have a good time comes from this 1978 classic. And if you've ever attended a toga party, there's a good chance this movie influenced how that went down.

One of the film's breakout actors, however, didn't even get to sit with the rest of the cast during what we can look at today as an historic premiere. Who was it?