King George III is the main antagonist of Act 1. He is the King of Great Britain and believes that the Colonies will not be successful in their revolution.


After Alexander Hamilton argues with Samuel Seabury, (“Farmer Refuted”) the ensemble sings that a message from the king will arrive shortly. Sure enough, King George III shows a strong assumption that he will win the Revolutionary War ("You'll Be Back"). However, following America's success, the king becomes rather irritated and sad, saying that America cheated with the French ("What Comes Next?"). Once George Washington steps down, King George learns of this and questions who might replace him. A soldier brings news to him of John Adams, Washington's replacement, and the king recalls having met him years ago in 1785, believing him to be a "little guy" that the Americans will eat alive. Musingly anticipating Adams' presidency, King George wishes him luck ("I Know Him").

King George III seems to progressively grow more insane, claiming that "when push comes to shove, I will kill your friends and family, to remind you of my love". After the war, he grows completely irrational and seemingly completely unwilling to compromise.

Notable Casting Changes Edit

Off-Broadway Edit

Brian d'Arcy James replaced Joshua Henry, who worked in the Vassar Workshop, to portray King George III off-Broadway.

Broadway Edit

Jonathan Groff took on the role of King George III in the Broadway Production of Hamilton.

From October 27 to November 29, 2015, Andrew Rannells played King George III while Jonathan Groff filmed the Looking movie.

Rory O'Malley took the role of King George III from Jonathan Groff on April 11, 2016. However, Groff returned to the show for one performance, which was filmed.

On January 17, 2017, Taran Killam stepped into the role of the king and ended his run on April 13, 2017.

During the interval between Taran Killam's final performance and Euan Morton's first one, the role was played by different cast members, including (from April 14, 2017 – July 16, 2017) Brian d'Arcy James.

He was replaced by Euan Morton on July 28, 2017, and as of March 8, 2019, he remains the current King George III.

The current understudy for King George III is Thayne Jasperson.

Hamilton Chicago Edit

In 2016, Alexander Gemignani joined the Original Chicago Production Cast as King George III.

On November 9, 2016, Andrew Call was cast as King George III for this production of Hamilton. He ended his role on December 11, 2016. 

The understudy for King George III was Jin Ha, up until June 11th, 2018. 

Hamilton West EndEdit

Michael Jibson portrayed King George III as a member of the West End Production Cast of Hamilton. He won the Olivier Award for Best Actor in a Supporting Role in a Musical while in this role.

In December 2018, Jon Robyns donned the crown of King George III.

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