She got her on-stage start in 2005, portraying Judy Battle in the Keen Company's revival of
The Bread Winner. She's made a variety of guest appearances on television shows, such as
Law & Order: Special Victims Unit, The Good Wife, Shameless, Boardwalk Empire, Twin Peaks: The Return and This Is Us. Kull appeared in the 2012 stage adaption of
Henry James' novel
Washington Square, titled
The Heiress. The play was directed by
Moisés Kaufman and starred
Jessica Chastain,
Dan Steven, and
David Strathairn. She starred in the 2014 crime television show
Gracepoint as Beth Solano. In 2017, she made a recurring appearance in
HBO's
black comedy drama series
Big Little Lies. From 2017 to 2018 she appeared in the
Amazon drama series
Sneaky Pete as Katie Boyd. In 2018, Kull appeared in a recurring role as Sadie, a nurse in the neurology ward, in the second season of
Mr. Mercedes. The same year, she appeared as Kathy Shaughnessy in the drama miniseries
The Looming Tower. From 2019 to 2020, Kull starred as Linda McQueen in the American
supernatural horror drama television series
NOS4A2. In 2020, she starred in the German
political satire drama
Curveball as Leslie. In 2022, Kull was cast as
Sally Jackson, mother of the
titular character in the
Disney+ fantasy show
Percy Jackson and the Olympians series. She also has a credit in
The Rookie where she appears as Diana in the episode "The Mickey". == Personal life ==