From Bryan Cranston to Brie Larson - here are 21 celebrities that were in Disney Channel Original Movies

Bryan Cranston, most famous for his role as a meth dealer on "Breaking Bad," may not seem like a likely Disney star, but the actor played the lead character in a 2001 Disney Channel Original Movie (DCOM).

He wasn't the first big name to pop up on the channel.

With the premiere of "Under Wraps" in 1997, Disney Channel began its era of original movies. Nearly 20 years later, 99 DCOMs have aired, including "Brink!," "Zenon, Girl of the 21st Century," and "Halloweentown."

In honor of "Adventures in Babysitting," which will be the 100th DCOM when it premieres on June 24, Disney Channel is going to air all of its original movies, starting with a four-day marathon of the 51 most popular ones over Memorial Day weekend.

Disney movies have been the launching block for many A-list celebrities, though not all of them made it big right away. And in some cases, actors already had prolific careers before starring in a DCOM.

Here are 21 celebs (and a bonus one!) that appeared in DCOMs over the years: