She accepted the award using her American accent, which tickled her on Twitter.
Anderson was born in the United States and grew up in Puerto Rico and London before returning to the United States.
Although the American series “The X Files” made her a star, she had many roles in British productions, including the Netflix drama comedy “Sex Education”, the BBC adaptation for “Bleak House” and the police drama “The Fall “, set in northern Ireland.
Anderson has lived in London for years.
“Part of me would like to be able to control it, but I can’t,” she said. “I just slip into one or the other. When I moved to the United States, I tried very hard to maintain my British accent because it made me different.”
Correction: An earlier version of this story distorted the location of “The Fall”. It is set in Northern Ireland.