We’ve already established that the cast and crew of Pretty Little Liars has a lot of fun behind-the-scenes. Just this month, Shay Mitchell (Emily) brought a remote control helicopter to set, the cast live-tweeted their late night shoot, and pretty much everyone Twitter-teased poor Ian Harding. But of all PLL memories, which did Shay call her favorite?

“Best memory...1st scene I had in the pilot,” Shay shared with the Twitter-sphere, leading us to believe that these guys have been having fun since day one. We’re guessing the scene Shay is talking about is the series opener that sees the Liars and Ali having a sleepover in the barn the night Ali disappears. There’s something sweet about Shay not only choosing a memory from the very beginning of PLL, but one that includes all of the Liars. Given the pranksters in the cast, we’re sure that scene was hilarious to film!

What’s been your favorite PLL moment? Let us know in the comments below!

Pretty Little Liars Season 4 premieres on Tuesday, June 11, 2013 at 8 p.m. ET/PT on ABC Family.