The symptoms of Crohn's disease can vary significantly among afflicted individuals. It is a chronic inflammatory disease, which has many complications involving gastrointestinal and other symptoms. The diagnosis of gallstone ileus is difficult in Crohn's disease and an early diagnosis can reduce mortality. We present a case of 72 year old female with known Crohn's disease with acute right iliac fossa pain. She was investigated with an abdominal CT, giving a definite diagnosis of gallstone ileus