Actress Anna Friel has been ordered by a council to tear down or rebuild an extension to her home in Windsor.
The Marcella star had built a one-storey extension at the rear of her Grade-II-listed house.
But council bosses in the town are now demanding Ms Friel make changes to the property within three months.
Windsor Council said the extension was not built in line with the planning permission it granted in 2014. Requested changes to the building had subsequently been ignored, it was claimed.
Windsor Urban Development Control Panel chairman Malcolm Alexander told the BBC: "We have had months and months and months of negotiation and persuasion, that has all just been ignored.
"It is very unfortunate, she is a very well respected and high profile resident. But we have to be consistent, we can't make exceptions."
The actress, who has also starred in Brookside, apologised to council bosses.
She said in a statement: "[I] want to reassure the necessary authorities that any final cosmetic requirements that need to be undertaken, will be done within the allocated remedy period."
