Mare Winningham
Mare Winningham
Portrays Agatha Seagrave
Occupation Actress
Born Mary Megan Winningham
May 16, 1959
Phoenix, Arizona, USA
Years Active 1976–present
Gender Female
Hair Brown/Blonde
Ethnicity Caucasian-American
Mare Winningham Gallery

Mare Winningham is an American actress who portrays Agatha Seagrave in Season 1 of CBS' Under the Dome.


Mare Winningham was born in Phoenix, Arizona, and raised in Northridge, California. She is the daughter of Marilyn Jean (née Maloney) and Sam Neal Winningham. She has three brothers and one sister. Her father was the chairman of the Department of Physical Education at California State University, Northridge (CSUN) and her mother was an English teacher and college counsellor at Monroe High School. She credits her first interest in acting to seeing an interview with Kym Karath on Art Linkletter's television show House Party when she was five or six years old.

Winningham attended Andasol Ave. Elementary School, where her favorite activities included drama and playing the guitar and drums. She took the extended drama option at Patrick Henry Junior High School and continued to study over her summer vacations at CSUN's Teenage Drama Workshop. It was at this time that she adopted the nickname "Mare". Her mother arranged for her to go to Chatsworth High School. In Grade 12, Winningham starred in a production of The Sound of Music, playing the part of Maria, opposite classmate Kevin Spacey as Captain Von Trapp.

Selected FilmographyEdit

  • Philomena as Mary
  • Brothers as Elsie Cahill
  • Turner & Hooch as Dr. Emily Carson
  • Criminal Minds as Nancy Riverton
  • The War as Lois Simmons
  • Clubhouse as Lynne Young
  • Grey's Anatomy as Susan Grey
  • Dandelion as Layla Mullich


Season 1 appearances
"Pilot" "The Fire" "Manhunt" "Outbreak" "Blue on Blue"
"The Endless Thirst" "Imperfect Circles" "Thicker Than Water" "The Fourth Hand" "Let the Games Begin"
"Speak of the Devil" "Exigent Circumstances" "Curtains"


External LinksEdit

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