While it couldn't quite eclipse the Barden Bellas of Pitch Perfect 2 this weekend, director George Miller's long-awaited Mad Max: Fury Road still did quite well at the box office, taking in $45.4 million domestically and $110.4 million worldwide in its opening weekend. Warner Bros. hasn't officially announced a follow-up yet, but George Miller revealed that he has already completed the screenplay for this sequel, which will be called Mad Max: The Wasteland. Here's what he had to say below, revealing that he wrote the sequel's screenplay and a novella during all of the production delays on Mad Max: Fury Road.

"We've got one screenplay and a novella. It happened because with the delays [on Fury Road] and writing all the backstories, they just expanded."

It's worth noting that, back in 2012, George Miller revealed that he planned on shooting two Mad Max movies back-to-back, Mad Max: Fury Road and Mad Max: Furiosa, which most likely centers on Charlize Theron's Imperator Furiosa. There have also been rumors that both Max Rockatansky (Tom Hardy) and Furiosa will get their own separate sequels, but that has never been confirmed. It's possible that Mad Max: The Wasteland solely centers on Max, with Mad Max: Furiosa to follow, but we'll have to wait and see if this is actually what George Miller plans on doing.

In related news, Charlize Theron revealed in a recent interview that she "went at it" with her co-star Tom Hardy, which doesn't come as much of a surprise since there had been plenty of rumors about friction between the actors and the filmmaker on the set. Here's what the actress had to say about her time on the set below.

"We f---n' went at it, yeah. And on other days, he and George [Miller, the director] went at it. It was the isolation, and the fact that we were stuck in a rig for the entire shoot. We shot a war movie on a moving truck - there's very little green screen. It was like a family road trip that just never went anywhere. We never got anywhere. We just drove. We drove into nothingness, and that was maddening sometimes. And it's material that's really frightening - we didn't have a script. Tom and I are actors who take our jobs seriously. Both of us want to please the directors we work with, and when you don't know if you can deliver on that, it's a frightening place to be - and for Tom more than me, because he was stepping into big shoes."

George Miller also supposedly joined the social networking site https://twitter.com/GMillerMax/status/600060056592322561|Twitter yesterday, although the account hasn't been verified as authentic quite yet. Still, if this is the actual director's Twitter account, he posted a tweet yesterday where he teased that there will be more Mad Max to come. Take a look at the filmmaker's tweet below, and stay tuned for more on the upcoming Mad Max sequels.

Related: Mad Max Director Sues Warner Bros., Delaying Fury Road Sequels