After nearly 20 years, the beloved, long-running children's series "Reading Rainbow" is back, this time on the KidZuko YouTube channel.

The first of four episodes hosted by Mychal Threets, a librarian and literacy advocate, will be released Saturday at 10 a.m. Eastern. The others will drop on subsequent Saturdays at the same time. Advertisement

Adam DeVine, John Legend, Chrissy Teigen, Gabrielle Union and Jamie Chung will appear, along with Rylee Arnold and Ezra Sosa from "Dancing with the Stars."

Threets, who goes by Mychal the Librarian on social media, steps into the shoes of original host LeVar Burton. Threets broke the reboot news Tuesday on his channels. KidZuko released a trailer.

"I was raised on Reading Rainbow, LeVar Burton is my hero," Threets wrote on Instagram. "I am

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