One can easily be lulled into the magical illusion of Marcel the Shell with Shoes actually having that fragile voice that he has, but you should know it’s actually the voice of Jenny Slate.

If you’re looking for proof, then look no further then Jenny’s appearance on The Late Show with David Letterman last night where she sang as Marcel.

Then, once you’re overtaken with how adorable this is, you’ll want to pick up the new book due out next week, Marcel The Shell, The Most Surprised I’ve Ever Been.