
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.

Superman IV: The Quest for Peace
1987 · as Teacher - JFK High School

Gattaca
1997 · as Marie Freeman

Kindergarten Cop
1990 · as Zach's Mother

Don't Tell Mom the Babysitter's Dead
1991 · as Carolyn

Last Dance
1996 · as Jill

Bye Bye Love
1995 · as Claire

Clean Slate
1994 · as Paula

In the Best of Families: Marriage, Pride & Madness
1994 · as Kathy

The Sweet Life
2017 · as Katherine

Into My Heart
1998 · as Kat

Ed
1996 · as Lydia

My Mother the Spy
2000 · as Alison Shaeffer

The Endless Game
1989

Doing Time on Maple Drive
1992 · as Karen

Mind Games
1998 · as Hannah Berrick

The Four Diamonds
1995 · as Irma Millard / Hermit of the Lagoon

The Robinsons: Lost in Space
2004 · as Maureen Robinson

Searching for David's Heart
2004 · as Claire Deeton, Darcy's mother