Kristen was spotted boarding a plane from Los Angeles International Airport to the UK on Friday.
She was then seen by many a shocked commuter getting off a packed tube with boyfriend Robert Pattinson and a group of American friends on Saturday.
It seems they have taken a leaf out of Rihanna’s guide to travelling around London.
Well, it is the most efficient way to get about the capital after all.
One commuter tweeted their shock about sharing the same carriage as the Twilight stars.
They wrote: "Just sat next to Robert pattinson and christen Stewart on the tube oh my god.
"we got off at London Victoria and was standing in between them two in the escalators she was with her American pals (sic)."
[Related article: Robert Pattinson and Kristen Stewart to spend Christmas apart?]
We wonder if this commuter got off at the same stop just to spend a bit of extra time around Rob and Kristen.
We’re pretty sure we would have done the same.
The two spent Xmas apart from each other. [Getty]
Kristen has joined Rob for their yearly tradition of spending New Year’s Eve on the Isle of Wight together.
The couple spent Christmas apart this year with Rob being pictured enjoying a night out with his friends at his local pub.
However, according to sources close to the couple, Rob’s family still hadn’t forgiven Kristen for cheating on him earlier this year leading to the two spending the festive period apart.
A source close to the couple stated: "They had a meal on Thanksgiving (22.11.12), and it was nerve-wracking for Kristen. She felt very uncomfortable and Rob's sisters couldn't be completely welcoming. It won't go back to normal straight away, even if Rob has decided to try again.”