Grease is the word — and apparently it’s also trending Twitter.

On Sunday night, thousands of hopelessly devoted fans took to Twitter to share their thoughts on Fox’s musical production "Grease: Live" … including the cast of the electrifyin’ show.

From Carlos PenaVega, who starred as Kenickie, the leather jacket-wearing leader of the “T” Birds, to the R&B vocal group Boys II Men, who channeled their inner angels during the live production, check out what the hand-jiving crew had to say of their automatic, systematic, hydromatic performance:

What did you think of "Grease: Live"? Sound off in the comments section below with your thoughts.