Watch the video below:
Tveit is set to appear as Danny Zuko in FOX's upcoming Grease: Live opposite Julianne Hough as Sandy Dumbrowski. He also appears as Mike Warren, an undercover FBI agent, on the USA series "Graceland."
Olivia Newton-John, the original Sandy in the "Grease" film, surprised Tveit with a good luck message.
Grease: Live will premiere on FOX Jan. 31, 2016. For more information, click here.