cinemorgue.com says not related. But they sure strike a resemblance!
Yes, they are related. Joan is John's older sister.
Yes, Ann is his sister.
Yes, John Cusack and Joan Cusack are related. They are Brother and Sister. Joan was born on October 11, 1962 in New York City, and John was born June 28, 1966 in Evanston Illinois. They also have...
Cyril Cusack and John Cusack are not related