Tuesday, December 3, is a very important day. Why? Well, it’s Amanda Seyfried‘s birthday! Yep, that’s right. The actress who played the infamous Karen Smith in Mean Girls is turning 34 years old today, and we cannot believe how fast time has flown by!

Everyone can probably agree that Mean Girls is one of the most epic movies ever, right? For those who forgot, it hit theaters back in April 2004 (when Amanda was only 18 years old!), but now, over 15 years later, it’s still just as iconic, TBH. It also starred Lindsay Lohan, Rachel McAdams, Lacey Chabert, Jonathan Bennett, Lizzy Caplan, Daniel Franzese and more.

But what is the birthday girl up to now? In honor of her birthday, J-14 decided to do some investigating, and it turns out, she’s accomplished a lot over the last 15 years. She went on to star in a ton of movies and TV shows, got married, gave birth to a daughter and so much more.

And she’s not the only one to change a lot since Mean Girls premiered. We went ahead and rounded up some then-and-now photos of the entire cast of the epic movie, as well as everything they’ve done since it came out. Yeah, fans are seriously not going to believe what some of them look like now! Talk about a MAJOR glo’ up.

Scroll down to see what the cast of Mean Girls is doing now and how much they have transformed over the years.

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