Green Day, 'American Idiot' Cast Celebrate 'Legit Rock And Roll' Opening Night

'The night was electric,' actor Tony Vincent says at afterparty.

With opening night of the "American Idiot" musical officially in the books, the guys in Green Day can officially focus on something else that's important: enjoying their natural high.

"This is the highest moment I think we've ever had as a band, in the 21 years we've been around," frontman Billie Joe Armstrong told MTV News at the "Idiot" afterparty, held at New York's Roseland Ballroom on Tuesday night.

"And we've been pretty high," drummer Tre Cool interjected.

That feeling of euphoria extended to the cast of "Idiot," too. After all, they've been working on the production for close to two years now, shepherding it through rehearsals, a run at the Berkeley Repertory Theater last year and, finally, to Broadway. It's been a labor of love every step of the way, so, you know, they were feeling pretty good at the party too.

"It's one of those nights that's going to be really difficult to put into words in the future," John Gallagher Jr., who plays Johnny, said. "It's been a long time coming. We've been working on the show for almost two years, so to open it on Broadway — which has always been the ultimate dream, the ultimate destination — it's just been incredible."

"The night was electric, because the house was incredibly endorsing of us, from the time that the curtain went up," added Tony Vincent, who plays St. Jimmy. "And when it went down, there was this huge relief, that what we brought to Broadway was legit rock and roll, for the first time in, I think, possibly, ever. And we killed it tonight."

Early reviews of the show have been equally gushing — The New York Times called the production "thrillingly raucous and gorgeously wrought" — and so, there seemed to be nothing to do besides celebrate. After all, it's been a long journey to get to this point.

"[It was] unbelievable. Just completely unbelievable," Michael Esper, who plays Will, said. "The experience of doing this show tonight was something I will never forget as long as I live. The excitement from the house, the feeling onstage, the love between everybody, it was overpowering."

Do you plan on seeing "American Idiot" on Broadway? Which albums do you wish would be turned into musicals? Discuss in the comments below!