“People have this idea you run in wearing tennis shoes and get lines thrown at you for a ton of money,” says Corey Burton, a veteran voiceover actor ... voice of The Tonight Show with Jay Leno ...

Other bugs in the group are voiced by former "Tonight Show" host Jay Leno, "This Is Us" actor Sterling ... They got the buy-in of celebrity voice actors who could draw eyeballs to the project.

"Boy, this is the hard part," Leno said, his eyes getting wet and his voice thick with emotion ... fresh from a scandal involving the actor and a prostitute. He did more Justin Bieber jokes.