As Harry and Ron learned the hard way during their second year, The Hogwarts Express leaves London's King's Cross Station from Platform 9 ¾ on September 1 at 11:30 AM.
And if you're not on the train by then, you're going to be left behind.
As Potterheads descended on King's Cross to celebrate the new year at Britain's most famous magic school, they were greeted by two surprise guests:
Newt Scamander (Eddie Redmayne) and Albus Dumbledore (Jude Law)!
Name a more iconic duo... We’ll wait. #BackToHogwarts https://t.co/dPAP3bGgDo— Pottermore (@Pottermore)1535799941.0
The train station hinted at magic to come before 11 AM arrived.
Due to International Statute of Secrecy, we’re unable to confirm if the 11:00 #KingsCross to #Edinburgh is the Hogw… https://t.co/pjylM3j0Oy— London North Eastern Railway (@London North Eastern Railway)1535795400.0
Some familiar music was being played over the train station's speakers...
This is what happens when you are walking through kings cross on the 1st of September at 11am. 💚❤️💛💙 #backtohogwarts https://t.co/nGVuxS5c2y— Karen Reyburn (@Karen Reyburn)1535797892.0
Then a couple of very welcome faces arrived!
When you arrive at Platform 9 3/4 for the Hogwarts Express and see Albus Dumbledore and Newt Scamander standing the… https://t.co/PpS6fuNwza— Raam Suresh (@Raam Suresh)1535802842.0
Eddie Redmayne and Jude Law surprise fans at Platform Nine and Three-Quarters #BackToHogwarts https://t.co/EWC7bq6Agk— Pottermore (@Pottermore)1535799829.0
The crowd was so busy watching Law and Redmayne that they almost missed the train!
Don’t all run at the wall at once! #BackToHogwarts https://t.co/maRwcbk0yi— Pottermore (@Pottermore)1535800452.0
There was just an announcement at kings cross station saying the train at platform 9¾ is now departing and I’m so h… https://t.co/KoRqbLhwSg— Lucy P (@Lucy P)1535796262.0
Passing through Kings Cross today was an experience! Them announcing the Hogwarts Express leaving over the speakers… https://t.co/cOHXS00JgN— Lewis R-J (@Lewis R-J)1535796946.0
King's Cross turned into a mini-Comic Con for the day...
...which was especially strange for passengers who didn't know the significance of September 1.
Walking through kings cross and seeing loads of people dressed up in Harry Potter costumes and a hogwarts express s… https://t.co/4LkxBQaDVj— ☔ Erin ☔ (@☔ Erin ☔)1535798015.0
Back to Hogwarts day for any Harry Potter heads. @PatrickHolland_ is down at Kings Cross for the festivities! And h… https://t.co/eTLmRvPwtU— After All This Time, Always (@After All This Time, Always)1535794365.0
Numerous charms were in place to stop muggles from noticing the upcoming departure.
Fun fact: Muggles can't read everything on this departure board. #BackToHogwarts https://t.co/Jfv0A10OlA— Pottermore (@Pottermore)1535796593.0
A Fantastic surprise! Watch #FantasticBeasts stars Jude Law and Eddie Redmayne describe the #BackToHogwarts moment… https://t.co/IJnfwD94Ia— Pottermore (@Pottermore)1535832307.0
Fans were jumping for joy and spreading their excitement on Twitter!
So glad I got changed this morning into dancing Hermione, there were so many lovely Harry Potter fans at kings cros… https://t.co/CGqqVqqfCL— Kelsey Ellison⚡️ (@Kelsey Ellison⚡️)1535802590.0
Dancing Hermione is ready to go #BackToHogwarts! https://t.co/mwlQgA9ID6— Pottermore (@Pottermore)1535799549.0
@LNER Muggles to stay away from Platform 9 3/4? Impossibe. Because muggles love their pounds they have long convert… https://t.co/1839i6MEz5— dbmoviesblog (@dbmoviesblog)1535806081.0
I just overheard, at Kings Cross on the 1st September before the Hogwarts Express leaves, a mum asking her children… https://t.co/g45SHqig68— emily waters (@emily waters)1535797575.0
Now that the students are all back at Hogwarts, another year of magic can begin!
Re: #BacktoHogwarts, to quote Dumbledore, “that was fun. Do you mind if I use the loo?” #HarryPotter https://t.co/xZNPp3yXHK— Patrick Holland (@Patrick Holland)1535825633.0