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Jayne Brook (born Jane Anderson, September 16, 1960) is an American actress, best known for her role as Dr. Diane Grad on the medical drama Chicago Hope, as a series regular for five of the show's six seasons. Since 2017, Brook currently has a recurring role as Starfleet Vice Admiral Katrina Cornwell in the series Star Trek: Discovery.

Jayne Brook
Jane Anderson

(1960-09-16) September 16, 1960 (age 59)
Years active1987–present
Spouse(s)John Terlesky (1996–present)

Early lifeEdit

Brook was born in Northbrook, Illinois.[1] 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, Alexandra Sophia and Annaliese Marie.


Her first acting role was in the film Superman IV: The Quest for Peace in 1987. During the late 1980s, she worked for a while in Great Britain, appearing in The Old Boy Network, a single season ITV comedy series about three ex-spies who set up as private investigators after the end of the Cold War.

Brook went on to appear in numerous film and television roles, first as Carolyn in the 1991 film Don't Tell Mom the Babysitter's Dead, a starring role in the spring 1993 ABC network version of Sirens, a guest star for a three-episode arc of L.A. Law and in the 1995 film Bye Bye Love. She also had a small part as a child's mother in Kindergarten Cop (1990). She had a major role in My Mother, the Spy (2000).

Her starring role in the ensemble cast of Chicago Hope, from 1994 to 1999, was followed by appearances in regular or recurring roles on such series as Sports Night, The District, John Doe, Boston Legal and Private Practice. Brook has been a guest star in single episodes of other series, including reuniting with her former Chicago Hope co-star Mark Harmon in a 2007 episode, "Cover Story", of his CBS television series NCIS.

Since 2017, Brook has had a recurring role as Starfleet Admiral Katrina Cornwell on the series Star Trek: Discovery.


Year Title Role Notes
1987 Superman IV: The Quest for Peace JFK High School Teacher
1990 Kindergarten Cop Mrs. Sullivan
1991 Don't Tell Mom the Babysitter's Dead Carolyn
1994 Clean Slate Paula
1995 Bye Bye Love Claire Carson
1996 Ed Lydia
1996 Last Dance Jill
1997 Gattaca Marie Freeman
1998 Into My Heart Kat
2000 Chain of Command Connelly's Ex-Wife (uncredited)
2017 The Sweet Life Katherine
Year Title Role Notes
1990 The Endless Game Mrs. Glazer Television film
1990 Equal Justice Bonnie Ehlman Episode: "The Price of Justice"
1990–1991 WIOU Ann Hudson 14 episodes
1992 Doing Time on Maple Drive Karen Television film
1992 The Old Boy Network Parker Morrow 4 episodes
1993 Sirens Officer Sarah Berkezchuk 13 episodes
1993 L.A. Law Beverly Halleran 3 episodes
1994 In the Best of Families: Marriage, Pride & Madness Kathy Television film
1995 The Four Diamonds Irma Millard/Hermit of the Lagoon Television film
1995–1999 Chicago Hope Dr. Diane Grad 103 episodes
1996 A Brother's Promise: The Dan Jansen Story Jane Jansen Television film
1998 Early Edition Dr. Diane Grad Episode: "Mum's the Word"
1998 Mind Games Hannah Berrick Television film
1999–2000 Sports Night Abby Jacobs 4 episodes
2000 Chicken Soup for the Soul Teacher Episode: "Footprints on My Heart/Legacy/Elopement"
2000 My Mother, the Spy Alison Shaeffer Television film
2000–2002 The District Mary Ann Mitchell 14 episodes
2002 Imagine That Wendy 6 episodes
2002–2003 John Doe Jamie Avery 21 episodes
2003 Without a Trace Ms. Atkins Episode: "The Bus"
2004 The Robinsons: Lost in Space Maureen Robinson Television film
2004 CSI: Miami Mia Eckhart Episode: "Legal"
2004 Jack & Bobby Susan Kramer Episode: "Lost Boys"
2004 Searching for David's Heart Claire Deeton Television film
2005 Everwood Mrs. Rogers Episode: "Pro Choice"
Episode: "So Long, Farewell..."
2006 Grey's Anatomy Gwen Graber Episode: "Blues for Sister Someone"
2006 Boston Legal Rachel Lewiston 4 episodes
2007 NCIS Lyndi Crawshaw Episode: "Cover Story"
2008 Eli Stone Rebecca Green Episode: "Soul Free"
2008 Private Practice Dr. Meg Porter 5 episodes
2008-2011 Brothers & Sisters Bertha Wandell Episode: "Prior Commitments"
Episode: "You Get What You Need"
Episode: "Never Say Never"
2009 Castle Claudia Peterson Episode: "Nanny McDead"
2009 The Cleaner Michelle Durham Episode: "Hello America"
2011 Off the Map Lynn Episode: "It's Good"
Episode: "Es Un Milagro"
2014 Revenge Loretta Deaton Episode: "Hatred"
2017–19 Star Trek: Discovery Adm. Katrina Cornwell 12 episodes


External linksEdit