VIDEO: Jonathan Groff Reveals Fallon Sings 'You'll Be Back' on HAMILTON Mixtape; Bestows Royal Honor

On last night's TONIGHT SHOW, guest Jonathan Groff broke the news that Jimmy Fallon will be featured on the highly anticipated HAMILTON mixtape singing "You'll Be Back". In honor of the acheivment, Groff made Jimmy stand on his desk to induct him as an honorary King George.

The "Looking" star explained, "When Brian d'Arcy James originated the king off-Broadway and when I came in to replace him he created this whole thing called the Order of the Garter." He went on to add, "In honor of you singing "You'll Be Back," [I] have brought the garter!" Watch the clip below!

Lin-Manuel Miranda also shared the news that Fallon sings "You'll Be Back" on the mixtape - check out his tweet below:

The new musical Hamilton has book, music and lyrics by Tony and Grammy Award-winning composerLin-Manuel Miranda, who also plays the title role. The musical is directed by Thomas Kail, with choreography by Andy Blankenbuehler and music direction and orchestrations by Alex Lacamoire. Hamilton is inspired by Ron Chernow's biography "Alexander Hamilton."

The cast of Hamilton is comprised of Lin-Manuel Miranda (Alexander Hamilton), Daveed Diggs(Marquis De Lafayette,Thomas Jefferson), Renée Elise Goldsberry (Angelica Schuyler),Christopher Jackson (George Washington),Jonathan Groff (King George), Jasmine Cephas Jones (Peggy Schuyler, Maria Reynolds), Javier Muñoz (Hamilton alternate), Okieriete Onaodowan(Hercules Mulligan, James Madison), Leslie Odom, Jr. (Aaron Burr),Anthony Ramos(John Laurens, PhilipHamilton) and Phillipa Soo (Eliza Hamilton).

HAMILTON is the acclaimed new musical about the scrappy young immigrant Alexander Hamilton, the $10 Founding Father who forever changed America with his revolutionary ideas and actions. During his life cut too short, he served as George Washington's chief aide, was the first Treasury Secretary, a loving husband and father, despised by his fellow Founding Fathers and shot to death by Aaron Burr in their legendary duel.