If you're curious about how Sesame Street has evolved, we've compiled a list of its most popular characters—ones you're sure to spot the next time you sit down to watch with your kids.

Explore Jim Henson's puppets and Muppets in the Smithsonian's collections along with ... Sam and Friends National Museum of American History Rosita puppet used on Sesame Street National Museum of ...

Now, the program is breaking new ground by introducing a character with autism, a Muppet named Julia. While Julia has appeared in an online storybook from Sesame Street, this will be the first ...

The lovable fuzzy "Sesame Street" Muppet celebrates in a big way on Feb. 3. Elmo is turning 3-and-a-half, his age forever and always, since he joined "Sesame Street" in 1980. Just go with it.

This image released by Sesame Workshop shows singer-songwriter Chris Stapleton, left, with muppet character Elmo on the set of "Sesame Street ... as well as the name of the musical guest.

This image released by Sesame Workshop shows singer SZA, left, with muppet character Oscar the Grouch on the set of "Sesame Street." (Richard Termine/Sesame Workshop via AP) ...