My, how time flies! It’s hard to believe that it’s been four years since Glee first started taping its pilot episode, right? And the show’s cast appears to be as incredulous about this feat as we are.

Yesterday marked the four-year anniversary of the start of Glee, so the cast celebrated the momentous occasion by watching the show’s pilot on the set during their lunch break. So cute! Kinda makes us want to watch the pilot again right now, too. (And then maybe we’ll watch it one more time after that. Because yes, it’s that good.)

As you can imagine, the experience of seeing what they all looked like four years ago was a bit of a shock. Kevin McHale (Artietweeted, “Just watched the pilot at lunch to celebrate Glee's 4 yr anniversary of the 1st day of shooting. We looked like babies!” And now that we think about it, we would totally watch a show about singing babies. Just throwing that out there.

Lea Michele (Rachel) marked the Glee-versary by tweeting, “Today is such a special day.. Four years ago we started the amazing journey of #Glee:)” And her real-life boyfriend Cory Monteith (Finn) was feeling both nostalgic and triumphant, tweeting: “four years ago today we started shooting a pilot... everyone wondered if ‘a singing show would work on primetime’ ...and here we are. :)”

But our favorite message about the milestone came from Naya Rivera (Santana), whose heartfelt tweet acknowledged her own personal growth along with appreciating the fans who have helped keep the show around for all these years. She tweeted, “I've grown up on this show, learned so much about life, friendship, and what it means to make a difference. #gleeanniversary

All in all, it sounds like this was quite an emotional time on the set. It’s also great to see how much this show still means to all of the original cast members, even as they get other opportunities in Hollywood. We can only imagine how young everyone will seem in the pilot when they gather to watch it four years from now.

And by the way, we were serious about that singing baby show. Ryan Murphy, the ball’s in your court.

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