After an unexpected tease on Facebook this morning, the BBC has revealed the new companion that Pearl Mackie will be joining Peter Capaldi in Doctor Who season 10.

Pearl was exclusively revealed to audiences on BBC One during half time the FA Cup semi-final on Saturday 23rd August. On joining the cast in her first major television role, Pearl said: “I’m incredibly excited to be joining the Doctor Who family. It’s such an extraordinary British institution, I couldn’t be prouder to call the TARDIS my home!”

Mackie went on to say, “Peter Capaldi is such a brilliant actor, and his Doctor is such a wacky and wonderful character, I can’t wait to see what adventures are in store for him and Bill throughout time and space. Reading the script at the audition I thought Bill was wicked. Fantastically written, cool, strong, sharp, a little bit vulnerable with a bit of geekiness thrown in – I can’t wait to bring her to life, and to see how she develops through the series. ”

Talking about her big reveal trailer Mackie said that, “Shooting the trailer was absolutely mental,” adding, “there were pyro technics and smoke and I met my first Dalek! I’m not sure it will ever become ‘the norm’ seeing crazy monsters on set, but I cannot wait to meet some more! The weirder the better, bring it on!”

Peter Capaldi spoke about the new casting as well saying, “It is a genuine delight to welcome Pearl Mackie to Doctor Who. A fine, fine actress with a wonderful zest and charm, she’s a refreshing addition to the TARDIS and will bring a universe of exciting new possibilities to The Doctor’s adventures.”

Steven Moffat, Lead Writer and Executive Producer added “A new face in the TARDIS, a new voyage about to begin: welcome aboard the amazing Pearl Mackie! This is where the story really starts.”

If you haven’t been keeping up with the last few seasons, and somehow avoided spoilers up until the point, you should stop reading now and get yourself caught up on Amazon.

In season 9 fans said goodbye to the “impossible girl,” Clara Oswald, who was played by Jenna-Louise Coleman. The actor quickly became a fan-favorite on the series after joining Matt Smith, Karen Gillan and Arthur Darvill back in season 7 in the episode “Asylum of the Daleks”. Coleman took over the role as the beloved companion through season 9, eventually replacing Amy Pond and Rory Williams.

After Matt Smith left the show at the end of season 8, Peter Capaldi took over the role of The Doctor for season 8 and will continue the role in season 10. Capaldi’s first season as the Doctor was one of the series’ most-watched seasons, with season 10 expected to break a few records of its own.

After just one season with Peter Capaldi, the show said goodbye to Coleman. It was a heartbreaking farewell for many Doctor Who fans, but in the end Coleman was ready to move on to new projects.

It was hard to say goodbye to Clara, not only because she was a fantastic companion, but Coleman and Capaldi were a terrific on-screen pairing. Coleman fans can still keep up with the actor on her new series “Victoria” where she plays a young Queen Victoria.

Shortly after it was announced that Oswald would be leaving the series, fans started to wait to see who will be cast as the new companion. Peter Capaldi admitted last year that he will eventually be moving on from the role as the Doctor (as all Doctors do), but no exit date has been announced at this time. Right now Peter Capaldi has agreed to do season 10, and we will see if he expands his role beyond that point.

In the last two seasons the show has gone out of its way to introduce new possibilities for casting the Doctor, explaining that the Doctor could be (and has been) a woman, and that Time Lords can change race when regenerating. Up until this point the role of The Doctor has only been played by white-males, but that could change with a new lead writer and showrunner.

Speaking of which, this season will say goodbye to Steven Moffat, who is leaving his post as the lead-writer on the long-running series. Moffat stayed with the show for six seasons, he was also an executive producer.

Steven began with Doctor Who on Season 5 in 2010, introducing the eleventh and the twelfth Doctors. On Steven’s watch we met Matt Smith and Peter Capaldi; as well as two companions Amy Pond (Karen Gillan) and Clara Oswald (Jenna Coleman) and he introduced many iconic characters and monsters. Those include River Song (Alex Kingston), Missy (Michelle Gomez), Rory Pond (Arthur Darvill) and the Weeping Angels.

Moffat was also on-hand to deliver the 50th Anniversary special in 2013, which was extremely popular with fans across the world on social-media. Steven’s final season will air on BBC AMERICA and BBC One in Spring 2017 and there will be a Christmas Special in 2016. After that, Chris Chibnall will take over the reigns, his debut season will launch in 2018.

The BBC also announced this year that there will be a spinoff series called “Class“. The series will star Greg Austin, Fady Elsayed, Sophie Hopkins and Vivian Oparah. They will be joined by Katherine Kelly, as she takes the role of a teacher at Coal Hill School.

According to the network’s announcements, these four Coal Hill School students have hidden secrets and desires. They are facing their own worst fears, navigating a life of friends, parents, school work, sex, sorrow – and possibly the end of existence.

Coal Hill School has been a part of the Doctor Who universe since the very beginning, but that has come at a price. All the time travelling over the years has caused the very walls of space and time to become thin. The BBC teased, “There’s something pressing in on the other side, something waiting for its chance to kill everyone and everything, to bring us all into Shadow.”

At the time of the spinoff’s announcement Steven Moffat said, “There’s nothing more exciting than meeting stars that nobody’s heard of yet. We had the read through of the first few episodes last week, and there was a whole row of them. Coal Hill School has been part of Doctor Who since the very first shoot in 1963, but this new show is anything but history. Class is dark and sexy and right now. I’ve always wondered if there could be a British Buffy – it’s taken the brilliant Patrick Ness to figure out how to make it happen.”

“Class” will be a YA series set in contemporary London. The show will include writer Patrick Ness, Director Ed Bazalgette (Poldark, Doctor Who), Producer Derek Ritchie, and Executive Producers Patrick Ness, Steven Moffat and Brian Minchin, the BBC Cymru Wales production, co-produced with BBC AMERICA and BBC Worldwide.

Here’s the new companion in action.