Maura Therese Tierney is an American actress. She is best known for her roles as Lisa Miller on the sitcom NewsRadio (1995–1999), Abby Lockhart on the medical drama ER (1999–2009), and Helen Solloway on the mystery drama The Affair (2014–2019), the last of which won her a Golden Globe Award.

NewsRadio is an American sitcom television series that aired on NBC from March 21, 1995 to May 4, 1999, focusing on the work lives of the staff of a New York City AM news radio station. It had an ensemble cast featuring Dave Foley, Stephen Root, Andy Dick, Maura Tierney, Vicki Lewis, Joe Rogan, Khandi Alexander, and Phil Hartman in his final regular role before his death in 1998; Jon Lovitz joined the show after Hartman's death.