Harry Potter and the Half-Blood Prince, starring Daniel Radcliffe as boy wizard Harry, will be on location overnight from Friday to Sunday.
Café Chaud on platforms one and two at the station is reportedly being used in the movie.
Filming for the sixth book in the Harry Potter series, which has made author JK Rowling a multi-millionaire, has only recently begun.
Seargeant Christopher MacKellaich, of the British Transport Police, said: "We will have officers down at the station on Friday, Saturday and Sunday night to assist with any public order issues associated with the filming.
"They are going to be filming overnight from late evening to the early morning and we will have six or seven officers down there each night."
14:15, 20 Nov 2007
by Matthew Rees