The glitz and glamor of being a celebrity often seem to be the coolest and most alluring part, but no one talks about the pinnacle of success when it comes to fame, and that’s being asked to appear on Sesame Street. Yes, there are awards to win and fortune to be had, but being able to say you’ve acted opposite Big Bird and Elmo? That’s not something to take lightly, and the following stars are just some of the most notable celebrities who’ve appeared on the beloved educational program Sesame Street.

Bruno Mars

Bruno Mars not only entertained but encouraged singing "Don't Give Up.”

Photography: Sesame Workshop

Jennifer Garner

Jennifer Garner brought a pretty big word to the table when she explained "galoshes" to the always-interested Abby Cadabby.

Photography: Sesame Workshop

Lin-Manuel Miranda

Lin-Manuel Miranda brought that Hamilton charm to pizazz to Sesame Street to rap about habitats alongside the one and only Big Bird.

Photography: Sesame Workshop

Maria Menounos

Somehow, Maria Menounos got a smile out of Oscar the Grouch when the hostess with the mostest shared a scene with him about senses.

Photography: Richard Termine

Robin Williams

If there was ever a celebrity made for Sesame Street, it was Robin Williams and his childlike wonder and good-natured spirit.

Photography: Zach Hyman

Katy Perry

Katy Perry didn't just come to educate — she also came to perform! She sang a revised version of her hit single, "Hot N Cold," featuring Elmo.

Photography: Sesame Workshop

Ian McKellen

It couldn't have been easy, but Sir Ian McKellen was up for the task when it came to teaching Cookie Monster about resisting.

Photography: Sesame Workshop

Alicia Keys

Grammy winner Alicia Keys didn't hesitate when asked to sing a song all about dancing to the tune of her debut single, “Fallin’."

Photography: Sesame Workshop

Mark Ruffalo

Mark Ruffalo is best known for being the Incredible Hulk in the Marvel Universe, but he showed a lot of heart when he came through with a lesson on empathy.

Photography: Jesse Grant

Nicole Kidman

Nicole Kidman and Oscar the Grouch educated about what stubborn means, but perhaps one day she'll return and explain the magic of movie theaters.

Photography: Richard Termine

Tony Bennett

It doesn’t get any more legendary than the late Tony Bennett and Elmo, does it?

Photography: Richard Termine

Zoe Saldaña

Who wouldn't have a smile as vibrant as Guardians of the Galaxy actress Zoe Saldaña while hanging out with Elmo?

Photography: Sesame Workshop

Josh Gad

Frozen's Josh Gad has said his favorite memory of Sesame Street revolves around watching it with his daughter, so she must've been extra stoked to see her dad on the show!

Photography: Sesame Workshop

Julie Bowen

Modern Family star Julie Bowen and Elmo likely started a bird-watching club after she taught him about the ins and outs of binoculars.

Photography: Sesame Workshop

Buzz Aldrin

There are a handful of careers that amaze children, and astronaut is one of them. So, to see Buzz Aldrin on Sesame Street teaching the children about space was an unforgettable moment.

Photography: Sesame Workshop

Lupita Nyong'o

When it comes to Oscar-winner Lupita Nyong'o and Elmo, the word of the day is iconic.

Photography: Sesame Workshop

James Gandolfini

Tony Soprano himself, the late James Gandolfini showcased a lot of levels on the hit HBO series that helped usher in a new era of anti-heroes, but did you know that he showcased even more when he stopped by Sesame Street to talk about what it is like to feel scared?

Photography: Sesame Workshop

Emma Stone

Emma Stone has a multitude of talents, including balancing, which is what she demonstrated when she hit Sesame Street.

Photography: Jesse Grant

James Blunt

There is nothing more beautiful than singer-songwriter James Blunt and Telly Monster singing about triangles.

Photography: Sesame Workshop

Liev Schreiber & Naomi Watts

Liev Schreiber and Naomi Watts appeared together on the show's 42nd season to help teach young viewers, like their two children, what "exchange" meant.

Photography: Richard Termine