Pedro Pascal and Kerry Washington were among the A-list stars who joined the No Kings Day protests against President Donald Trump.

Speaking at a "No Kings" rally in Washington, D.C., Bill Nye, the former host of "Bill Nye the Science Guy," urged lawmakers to “stop the abuses of this petulant president [Trump] and his circle of sycophants,” declaring, “No thrones, no crowns, no kings."

Organizers said some 2,600 protests were planned in the U.S. on Saturday. The protests were largely peaceful, as demonstrators united in their stated aim to safeguard the country's democratic values.

Dozens of "No Kings" rallies are scheduled across western Washington for Saturday, Oct. 18, from Bellingham to Vancouver, to the San Juan Islands.

Large crowds of protesters marched and rallied in cities across the U.S. Saturday for ” No Kings ” demonstrations decrying what participants see as the government’s swift drift into authoritarianism under President Donald Trump.

The demonstrations follow a wave of protests in June that organizers say drew more than 5 million people in cities across the country.

At a “No Kings” protest in Washington, D.C., Bill Nye tells NBC News’ Melanie Zanona that federal cuts to science funding, especially around NASA, are “thoughtless.”