Have you ever looked at your lifelong best kitty and thought “man I remember when you could fit into a teacup?” It’s super fun to go back and look at pictures of when you first got them and how much they’ve changed over the years. If you live with them then it comes so gradually that you barely even notice! I thought of my two cats as kittens for a long time until I saw pictures of the week we got them. Suddenly I realized I was looking at two teenagers!

Today, we’ve compiled 40 of the best “before and after” pictures of cats growing up for your enjoyment!