STAGE TUBE: Broadway's Favorite Critic, Iain Armitage Raps His Heart Out at #Ham4Ham

HAMILTON's #Ham4Ham lottery performance has quickly become one of Broadway's favorite traditions as fans gather in front of the Richard Rodgers Theatre to see what HAMILTON writer Lin-Manuel Miranda has in store- and who his guest performer is.

Today's special guest was none other than kid critic Iain Armitage of "Iain Loves Theatre" fame. Below, watch as he raps both Hamilton and Jefferson's parts from "Cabinet Battle #1" with Miranda, Daveed Diggs, and Christopher Jackson! Too adorable to miss!

A few hours before the performance, Miranda tweeted a hint at the identity of his guest, "Our littlest and bestest #Ham4Ham show, today at 5:55pm."

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."

$10 front row seats for Hamilton - the new musical about the $10 Founding Father, Alexander Hamilton are on sale for each show by lottery. The lottery begins two and half hours prior to each performance when patrons may enter their name at the Richard Rodgers Theatre (226 W. 46 St.) for a chance to buy up to two front row tickets for $10 each -Hamilton for "Hamilton." The winner's names will be drawn 2 hours before show time. Entrants must present photo ID, and the winners must pay with cash at the box office.

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.