who plays admiral cornwell on star trek discovery
Jayne Brook 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.