It takes a lot of work to make Pretty Little Liars — just ask the cast! Not only do they film scenes where they're regularly sprinting from a mysterious psycho killer in the woods, but they also need to wake up at the crack of dawn to do it!

"4:30am wake up... 5am call time. Hellooooooo season FOUR of #PrettyLittleLiars ! So happy to be back at my 2nd home 😊 #sleepwhenimdead," Shay Mitchell (Emily) tweeted yesterday (March 14). We're can hardly contain our excitement! But how long will we have to wait for the premiere?

Season 4 of Pretty Little Liars premieres on June 11 at 8 p.m. ET with the“A Is for A-l-i-v-e.” As for what kind of thrills and chills we can expect in the new season, showrunner Marlene King has already tweeted that it's going to be “killer.” We even may find out who pushed Ian off of the bell tower in Season 1 in the aftermath of the Red Coat Reveal.

It looks like Shay isn't the only one who will be losing sleep. We can hardly wait!

Catch the Season 3 finale on Tuesday, March 19, 2013 at 8 p.m. ET/PT on ABC Family.