Kingston and Salmon for Series 4

The BBC Press Office has announced that Alex Kingston and Colin Salmon will appear as guest stars in writerSteven Moffat's two-part story for the fourth series of Doctor Who, which is currently filming.

Kingston, who will play a character named in the press release as River Song, is best known for her regular role in the American television drama series ER. In the UK, she starred in the one-off dramas Moll Flanders and Boudecia for the ITV network. Salmon has been seen in a variety of roles in British film and television, including as the supporting character Charles Robinson in the James Bond films Tomorrow Never Dies, The World Is Not Enough and Die Another Day. His character in Doctor Who has not yet been named.

BBC News and The Sun have stories about the casting announcement.