That’s Jodie Whittaker as the new Doctor. Many know her for starring opposite John Boyega in the British invasion thriller “Attack The Block.”
I imagine we’ll get a glimpse of her in a “Doctor Who” BBC special airing this Christmas, followed by 10 new episodes launching about a year from now.
That thing in the background is her time machine, which she has cleverly disguised as a "police box."
This is how The Doctor used to dress after something fell on his head while he was watching an episode of "Batman":