Credit: Instagram

Apparently we can expect some intense nighttime action during Pretty Little Liars Season 4, because the cast and crew have been caught up in long night shoots for the last few days. The result? Probably awesome scenes, and definitely some very funny tweets.

Two nights ago, the Liars had fun teasing a very tired Ian Harding and downing coffee to stay awake. Yesterday night, they had to do it all again — and they were joined by Ravenswood cast member Brett Dier (which means they're probably still be working on the Halloween episode, because that's the one he's in.)

Brett posted the image above, writing, "My tiredness level is about a 7.3 at this point. Night shoots. #PLL"

Troian Bellisario (Spencer) joined him in tweeting her misery, writing, "Brutal. Night II. PLL. Still shooting. Sky is a rosy pink. I'm a lovely shade of death warmed over. @AshBenzo @shaymitch @lucyhale."

Later, she shared just how loopy things were getting, tweeting, "'WOLF! WOLF!.... Oh wait that's a cat' -@lucyhale   Were losing it @imarleneking."

And yes, if you were wondering, they were on the PLL set until the sun came up. Wow!

Find more Pretty Little Liars spoilers here.

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

Source: @Brettdier, @SleepintheGardn, @SleepintheGardn, @SleepintheGardn

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.