J.B. Smoove's Hooked on 'This is Us' and Wants to Land a Role

J.B. Smoove's just discovered what millions of people already know -- "This is Us" is great television ... and he can't stop watching it.

We got the comedian and "Curb Your Enthusiasm" star at LAX Saturday and asked him a question he couldn't answer ... because he's been too "locked in" on the hit NBC drama to follow the news.

Smoove tells us he's been binge-watching and raves about how good the cast is. He says it could always get better, though ... if he was on it!