Helena Bonham Carter was filming at UCL today

Bellatrix Lestrange, is that you?

Helena Bonham Carter was spotted filming at UCL today.

She was seen walking through the halls of the university with a film crew at around 11.40am.

The actress shocked unexpected students who were waiting around for their up-coming seminars and lectures. They were pleasantly surprised and you bet they were geeked out.

Speculation has it that Ms. Bonham-Carter is on campus to film her up-coming role as Princess Margaret, Elizabeth’s sister in The Crown. She is no stranger to royal families as she has played the Queen Mother in The King’s Speech, which was an Oscar-nominated role.

UCL students took to Twitter to report their sightings of Ms. Bonham-Carter, one saying they saw her whilst they were waiting for their seminar.

Another student saying she saw her and gasped so loudly that the camera crew heard her and laughed.

Another just wanted to say hello to the actress.

It’s just not something you expect to see when you go in for work in the morning.