The official Doctor Who twitter account has released a short video teasing the upcoming thirteenth Doctor, who will replace Peter Capaldi on the show.
The video promises that we will "meet the 13th Doctor after the Wimbledon Men's Final on Sunday, July 16th, and omg, that's two days from now!
— Doctor Who Official (@bbcdoctorwho) July 14, 2017
So who will it be? Speculation has run rampant since Peter Capaldi announced he was leaving, with names like Kris Marshall, Phoebe Waller-Bridge, Olivia Colman, Hayley Atwell, Richard Rankin, Ted McGinley, Tilda Swinton, and many more all rumored at one time or another.
The BBC would probably love to keep things a surprise until then, but since they have to film the Christmas special where Capaldi will regenerate, they probably can't hope to keep things under wrap until the show debuts. At least this way, they get to reveal the next Doctor on their own terms.