Kim Thomson (born 1960) is a British actress who has appeared on stage, television and film since the early 1980s in both the United Kingdom and the United States.
Thomson had a Scottish father and an Irish mother. Her parents split up when she was three and she was brought up in Surrey by her father's parents, who were originally from Alloa. At the age of six, she was sent to a boarding school for five years. Much later she went on record to say boarding schools should be abolished.
She trained as an actress at the Central School of Speech and Drama.
Thomson shared her first lead in Stealing Heaven (1988) with Derek de Lint and Denholm Elliott. In its review, Films and filming said "Kim Thomson's Heloïse moves with delicate poise, a heroine worthy of Rossetti or Burne-Jones, with vivacity and intelligence. The next year, 1989, she played Estella in a film of Great Expectations directed by Kevin Connor, with Jean Simmons, who had played Estella in the 1946 film, as Miss Havisham. Also in 1989 she was Cordelia on stage in King Lear, directed by Jonathan Miller, with the British Theatre Yearbook commenting "Kim Thomson's Cordelia can rarely have been equalled; she was exquisite in beauty, tender in care, full of youthful integrity."
In 1992, Thomson was the leading lady of the TV series Virtual Murder, and in 1994 played another leading role in a costume drama series, The Wanderer. Dozens more appearances in film and on television followed, often as a character actress, such as her role as a society reporter in The Princess Diaries 2: Royal Engagement (2004).