Whether it's looking in the mirror and noticing a few gray hairs or feeling like time is flying by, we are all getting older. While we may have perspective on the idea of 'growing up,' 5-year-old Sadie, featured in this viral video refuses to accept that her adorable baby brother is going to grow up like her.

Why doesn't she want him to grow up? Because, he's so cute the way he is! In the video, Sadie is seen looking at her brother smile and remarks, "I wish you could stay this cute forever" while sobbing to her mom through the whole ordeal.

Click on the video above to see what what we're talking about. We promise, it'll make you smile!