Fifteen years ago, the Pixar classic that is Monster's Inc. was released.

Starring John Goodman and Billy Crystal, the animated feature followed monsters working in a corporation that uses the screams of children to generate power for the city.

However, the monsters have a change of heart when they meet Boo, a small, adorable girl with a playful personality.

As with the monsters, Boo completely stole our hearts, as did the actress who played her, Mary Gibbs.

Mary was only 5 years old when she played the role. You can see pictures and a behind-the-scenes video of her below:

 

John Goodman and I at the Monsters Inc premiere

A post shared by Mary Gibbs (@yoga_boo) on

 

 

How they got me to scream 😂 #boo #monstersinc #recording

A post shared by Mary Gibbs (@yoga_boo) on

 

 

Mary Gibbs has grown up since and now works as a yoga teacher. As a sweet throwback to her iconic role, she made her Instagram username “yoga_boo” and on occasion even shares throwback pics from the Disney Pixar movie.

 

It's my birthday! Here's to being 20, too young to drink but officially not a teenager ðŸÅ½ˆ

A post shared by Mary Gibbs (@yoga_boo) on

 

 

 

 

Via Instagram