What The Little Girl Who Voiced 'Boo' From 'Monsters Inc' Looks Like 15 Years Later

Monster's Inc. came out 15 years ago today! Feeling old yet?

We instantly fell in love with professional “scarers” James P. “Sulley” Sullivan and Michael “Mike” Wazowski.

And we also fell in love with cute little, Boo - the child who wasn't scared of Sulley or Mike.

via GIPHY

Boo was voiced by a very talented girl named Mary Gibbs, who is all grown up now! 

Photo / Mary Gibbs and co-star Billy Crystal who voiced Mike / Getty Images 

The 20-yr-old can be found on Instagram, sharing regular snaps of her doing cool things like Yoga (she's a trainer), but also throwbacks to her days as 'Boo'! 

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

A photo posted by Mary Gibbs (@yoga_boo) on Oct 5, 2016 at 12:02pm PDT

"A man is not called wise because he talks and talks again; but if he is peaceful, loving and fearless then he is in truth called wise.” ~Siddhārtha Gautama Buddha.

A photo posted by Mary Gibbs (@yoga_boo) on Aug 16, 2014 at 2:18pm PDT

*had to repost after some minor editing* "And those who were seen dancing were thought to be insane by those who could not hear music." ~Friedrich Nietzsche // mermaid pose 🐬 #yoga#yogi#yogaeverydamnday#feeltheyogahigh#igyoga#instayoga#igfit#instafit#fit#fitness#mind#body#connection#energy#namaste#movement#movement#inspiration#inspiredyogis#passion#beauty#beach#gopro#gopro2014

A photo posted by Mary Gibbs (@yoga_boo) on Jun 29, 2014 at 4:34pm PDT

Never before seen photos of me in the recording studio. 🎤🎤 I'm cleaning out old bins and found my Monsters Inc scrap book.. More photos to come! #boo #monstersinc #recording #exclusive

A photo posted by Mary Gibbs (@yoga_boo) on Mar 28, 2015 at 7:43pm PDT

Me pretending to be my dad ❤️

A photo posted by Mary Gibbs (@yoga_boo) on Mar 29, 2015 at 2:20pm PDT

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

A photo posted by Mary Gibbs (@yoga_boo) on Mar 28, 2015 at 9:10pm PDT

And she's also an amazing aerialist:

Tick tock drop #acro #acrobatics #silks

A video posted by Mary Gibbs (@yoga_boo) on Apr 21, 2015 at 8:16pm PDT