Lin-Manuel Miranda found that out last night, as the Hamilton star made a fun cameo in a Founding Fathers cold open sketch starring President Trump, and by the end, he was fighting for his life not to start laughing.

Last night’s Saturday Night Live cold open featured an unexpected cameo when Lin-Manuel Miranda joined the cast during a skit set at the signing of the Declaration of Independence. The cast, dressed in 1700s attire, recreated the historic moment with a twist: Miranda, donning his iconic Hamilton costume, appeared onstage to thunderous applause.

Lin-Manuel Miranda reprised his role of Alexander Hamilton in the latest "SNL" cold open, which brought him face-to-face with President Trump.

Lin-Manuel Miranda returned to his role as Alexander Hamilton for the Saturday Night Live cold open, as he and other founding fathers have their new democracy celebration stopped and frozen in time by a gloating Donald Trump (James Austin Johnson) marking his return to office.

Alexander Hamilton made his way onto this week’s Saturday Night Live cold open, courtesy of the one and only Lin-Manuel Miranda. The Hamilton Broadway star reprised his singing role for a sketch about the Founding Fathers, which was going as planned until Donald Trump (James Austin Johnson) interrupted.

Timothée Chalamet was the host and musical guest for the episode. He covered Bob Dylan songs, paying homage to his role in 'A Complete Unknown,' partly filmed in Cape May.

Nearly 250 years ago, delegates gathered in Philadelphia to form the Declaration of Independence. John Hancock (Mikey Day) signed it the "biggest." Cameo alert! Lin-Manuel Miranda reappears as Alexander Hamilton from his iconic musical. But it is a bait and switch.

Tonight’s “Saturday Night Live” cold open had a very special surprise in store for viewers as Lin-Manuel Miranda popped up onscreen behind the “SNL” cast who were dressed in 1700s attire in a scene of the signing of the Declaration of Independence.

As Lin-Manuel Miranda channeled Alexander Hamilton in one musical bit, Timothée Chalamet channeled Bob Dylan in two others.

The skit featured the country's founders, including Lin-Manuel Miranda of Hamilton, appearing as Alexander Hamilton in a Broadway cameo.

Lin-Manuel Miranda made a surprise return as Alexander Hamilton during a cameo on Saturday Night Live. The NBC sketch comedy show’s cold open on Jan. 25 featured Miranda reprising his iconic Hamilton role in a hilarious spoof of the U.S. founding fathers signing the Declaration of Independence.

The Founding Fathers – joined by Lin-Manuel Miranda as Alexander Hamilton – tried to raise a glass to freedom on “Saturday Night Live,” but were interrupted by James Austin Johnson as President Donald Trump.