Katie shared a hilarious video and a whole bunch of BTS pics from the filming.
This cast always look like they have the best time together.
Vanessa posted this beautiful moment from the episode.
Excuse us while we just tear up all over again...
Lea was so excited about live tweeting along with the episode she directed.
This woman is seriously talented. She did such a good job!
Constance shared some love for her amazing director.
Two brilliant, talented women -- so much inspiration in one photo!
Gilles was super happy to be reunited with his on-screen wife.
These two 💕 And Lucas' photobombing 😂
They celebrated with this gorgeous cake!
Which looked almost too good to eat!
And shared a toast together.
No celebration is complete without some bubbles.
They also had this super sweet video message for the fans.
Last three episodes?! We still don't know how we're even going to cope with that!
How much did you love the 100th Episode of Switched At Birth? Tell us in the comments.
You can watch the episode again right here on Freeform!