
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.

Grey's Anatomy
TV • 2005

NCIS
TV • 2003

CSI: Miami
TV • 2002

Boston Legal
TV • 2004

Castle
TV • 2009

Without a Trace
TV • 2002

Private Practice
TV • 2007

Rizzoli & Isles
TV • 2010

Chicago Hope
TV • 1994

Brothers and Sisters
TV • 2006

Star Trek: Discovery
TV • 2017

Everwood
TV • 2002

Revenge
TV • 2011

Early Edition
TV • 1996

The District
TV • 2000

John Doe
TV • 2002

Eli Stone
TV • 2008

Gattaca
MOVIE • 1997