Jonathan Groff, who plays his final performance this weekend as King George III in Hamilton, said his public farewell April 7 on NBC-TV's The Tonight Show, with a special ceremony for host Jimmy Fallon.

Fallon is one of the celebrities who will cover numbers from the hit Broadway musical on the forthcoming Hamilton Mixtape album. Fallon revealed that he is the one chosen to record Groff's song, “You'll Be Back.” Read about Hamilton Mixtape here.

Groff revealed on the show that Brian d'Arcy James (Something Rotten!), the actor who originated the role of King George III in the Off-Broadway production of Hamilton, inaugurated a special ceremony when one King hands the role over to a new one. He said they join the Order of Garter (created in imitation of the real-life English Most Noble Order of the Garter).

Groff said he is about to perform the ceremony when he hands the role over to Rory O'Malley this weekend, and said that he would make a special case and induct Fallon because of this recording the song for Hamilton Mixtape.

After commanding the Tonight Show studio audience to acclaim Fallon “in voices bold and throaty,” he slipped a garter onto the host's leg.

Watch the ceremony below: