Jayne Brook (born September 16, 1960) is an American actress, known for her role as Dr. Diane Grad on the medical drama Chicago Hope. She appeared on the series from 1995 to 1999. Brook was born Jane Anderson Brook in Northbrook, Illinois. She graduated from Glenbrook North High School in 1978 at the age of 17. She then went on to attend Duke University on scholarship, earning a bachelor's degree in 1982. Brook is married to actor and director John Terlesky. They have two daughters. Her first acting role was in the film Superman IV: The Quest for Peace in 1987.
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