I Capture the Castle is a 2003 British romantic comedy film directed by Tim Fywell.

Romola Garai played the lead role of Cassandra Mortmain alongside Bill Nighy, Rose Byrne and Tara Fitzgerald.

The film follows 17-year-old Cassandra Mortmain, and her eccentric family, struggling to survive in genteel poverty in a decaying English castle.

The characters include her father, a writer who hasn't written anything in the 12 years since the spectacular success of his first novel; her older sister, Rose, who rails against their fate and hopes to marry for money; and their bohemian stepmother, Topaz, an ex-model still apt to sunbathe in the nude.

The possibility of salvation seems to loom in the form of their wealthy American landlord, Simon Cotton, and his brother, Neil.