The Grey’s Anatomy Season 9 finale is only four weeks away, and what happens is supposed to blow us away. Sounds amazing, right? Yep, in fact, so amazing that the details of how the season ends have been kept secret from everyone, even the cast... until now!

Friday, Camilla Luddington (intern Jo Wilson) tweeted, “Just heard that we will know what happens in the finale on Monday. I suddenly got butterflies.. Eek!”

Last week, Camilla mentioned that how the season ends was being kept from the cast, so this must mean they are about to film the finale. We’ll be keeping an eye on Twitter to find out if any of our favorite Grey’s stars share their thoughts once they find out what the shocker we’ve been promised is.

How do you think Season 9 will end? Sound off in the comments!

Catch the next new episode of Grey’s Anatomy on Thursday, April 25, 2013, at 9 p.m. ET/PT on ABC.