Pretty Little Liars has just entered its end game as its seventh and final series kicked off this week, which makes us terribly sad.

Fortunately, series creator I Marlene King just dropped a MAJOR clue about the identity of A, which has managed to cheer us up just a little as we go back to connecting the dots.

Speaking to Cosmopolitan, King dropped the biggest hint yet about who is behind the hoodie, revealing that she has known A's true identity since the beginning of the series.

Netflix

"We knew the original A would be Mona," King explained. "I really believed the original A had to be Mona — but we had to do that in a way that still surprises the fans of the books.

"I knew who our show's A would be at the end — who we haven't revealed yet — but I didn't know we'd have Little A in between that."

Netflix

So, the A who terrorised the Liars in season one turned out to be Mona, while everything that came after was ultimately revealed to be (mostly) the work of Alison's transgender sister Charlotte, who was born Charles Drake and was the puppet master of the A Team.

After Charlotte's death in season 6 though, the girls received more threats from 'A.D.' (also known as 'Uber A') and it became clear the real villain was still at large.

While the pool of suspects is still pretty wide, King's new information here surely rules out the series' more recent additions.

So if you need us, we'll be focusing our attention on all those shifty characters from the early days. Which means it could be... well, just about anyone really.

ABC

King also dropped hints earlier this year that Uber A's reveal will prove to be a 'sad' one, explaining that she thinks "every villain has a real human story".

"The best villains are relatable people. In my humble opinion," she added.

Pretty Little Liars: Endgame airs on Freeform in the US and on Netflix in the UK.

Want up-to-the-minute entertainment news and features? Just hit 'Like' on our Digital Spy Facebook page and 'Follow' on our @digitalspy Twitter account and you're all set.

This content is created and maintained by a third party, and imported onto this page to help users provide their email addresses. You may be able to find more information about this and similar content at piano.io