Jayne Brook (born September 16, 1960) is an American actress, best known for her roles as Dr. Diane Grad on the medical drama Chicago Hope, as a series regular for five of the show's six seasons, and Mary Ann Mitchell on The District from 2000 to 2002. Between 2017 and 2019, Brook had a recurring role as Starfleet Vice Admiral Katrina Cornwell in the series Star Trek: Discovery.

Jayne Brook

Acting Born September 16, 1960 Northbrook, Illinois, USA

Jayne Brook (born September 16, 1960) is an American actress, best known for her roles as Dr. Diane Grad on the medical drama Chicago Hope, as a series regular for five of the show's six seasons, and Mary Ann Mitchell on The District from 2000 to 2002. Between 2017 and 2019, Brook had a recurring role as Starfleet Vice Admiral Katrina Cornwell in the series Star Trek: Discovery.

Known For

NCIS

Lyndi Crawshaw

Grey's Anatomy

Gwen Graber

CSI: Miami

Mia Eckhart

Castle

Claudia Peterson

Without a Trace

Anne Atkins

Rizzoli & Isles

Senator Valerie Bloomfield

Star Trek: Discovery

Katrina Cornwell

Boston Legal

Rachel Lewiston

Everwood

Mrs. Rogers

Chicago Hope

Diane Grad

Private Practice

Dr. Meg Porter

Revenge

Loretta Deaton