Ally Walker is an American actress. She made her television debut in the NBC daytime soap opera Santa Barbara (1988) before landing the leading roles on the short-lived dramas True Blue (1989–1990), and Moon Over Miami (1993).

During the 1990s, Walker had roles in films such as Universal Soldier (1992), Singles (1992), When the Bough Breaks (1994), While You Were Sleeping (1995), Kazaam (1996), and Happy, Texas (1999). From 1996 to 1999, she played the leading role of Doctor Samantha Waters in the NBC crime drama series Profiler, for which she received a Saturn Award for Best Actress on Television nomination. She returned to television with a role in the HBO drama series Tell Me You Love Me (2007), and later played villainous Agent June Stahl in the FX crime drama, Sons of Anarchy (2008–2010). Walker also had the leading role in the short-lived Lifetime police drama series The Protector in 2011. During seasons 4 and 5 (2014 and 2015) of Longmire, she played Dr. Donna Monaghan, a therapist treating veterans who is the title character's love interest.

Early life Walker was born to James Joseph Walker, a physicist, and Louhannah (née Mann) who would become an attorney. She grew up in Santa Fe, New Mexico, where her father worked at the Los Alamos National Laboratory. Originally intending to become a scientist, she attended the University of California, Santa Cruz, where she earned a degree in biochemistry in 1983. While spending a semester at Richmond College of Arts in London, UK, she discovered an interest in performing. After graduation, she worked for a time sequencing DNA at a genetic engineering company, but then sold all her possessions, traveled to Australia, surfed, and worked a series of jobs before returning to Los Angeles. Although she planned to enter medical school, instead she became a model and obtained roles in commercials including as Clairol’s “Nice & Easy Girl”. Her acting career began when she was cast in the film Aloha Summer (1988), but her scene was cut from the final version.

Career In early 1988, Walker joined the cast of NBC daytime soap opera Santa Barbara, playing Andrea Bedford. Later that year, she began appearing on primetime television. During the 1989–90 television season, she played the female lead in the short-lived NBC crime drama series True Blue. She later guest-starred on Matlock, L.A. Law, and Tales from the Crypt. She starred in the 1991 NBC television movie Perry Mason and the Case of the Fatal Fashion as murderer Julia Collier; the devious daughter of Diana Muldaur's character. In 1993, she starred alongside Billy Campbell in the short-lived ABC comedy-drama, Moon Over Miami.

In 1992, Walker played the female leading role opposite Jean-Claude Van Damme in the science-fiction action film Universal Soldier directed by Roland Emmerich. Later that year, she played Sheila Kelley's grouchy roommate in the Cameron Crowe romantic comedy Singles. Her first star-billed role was in the 1994 thriller When the Bough Breaks. In 1995, she had supporting roles in Sandra Bullock's box-office hit While You Were Sleeping, and Andy García's flop Steal Big Steal Little. The following year, Walker co-starred alongside Shaquille O'Neal in the fantasy comedy film, Kazaam.

In 1996, Walker was listed as one of Peoples "40 Most Fascinating People on TV". The same year she was cast in the leading role as Doctor Samantha Waters in the NBC crime drama series Profiler, a role for which she received a Saturn Award for Best Actress on Television nomination in 1998, and a Satellite Award for Best Actress – Television Series Drama. Walker starred as the series lead during the first three seasons, but left the show in the fall of 1999. She was replaced by Jamie Luner as a new profiler during the show's final season. Later in 1999, Walker co-starred opposite Steve Zahn in the comedy film Happy, Texas, and played the lead role in the Lifetime television movie, If You Believe.

In 2002, Walker returned to star in and produce the ABC pilot comedy called My Wonderful Life, which was not picked up. In 2005, she released a documentary film For Norman... Wherever You Are as director and producer, which screened at several film festivals. She returned to the New York stage, appearing in a number of Off-Broadway productions. From 2005 to 2010, Walker played many guest roles on television, including Sleeper Cell, ER, The Shield, Boston Legal, Law & Order, CSI: Crime Scene Investigation, Southland, and Law & Order: Special Victims Unit.

In 2007, Walker starred in the HBO drama series about sexual relationships, Tell Me You Love Me. The series was cancelled after a single season. In 2009, she co-starred in films Toe to Toe and Wonderful World opposite Matthew Broderick. From 2008 to 2010, Walker had the recurring role as ATF Agent June Stahl, a major antagonist on the FX crime drama series Sons of Anarchy.

In 2011, Walker played the leading role in the Lifetime police drama series The Protector, which revolves around a single mother who struggles to balance her family and professional life as an LAPD homicide detective. The series was canceled after one season. In 2014, she played the mother of Chyler Leigh's lead character in the short-lived NBC police procedural, Taxi Brooklyn. She made her feature scripted film directing and writing debut with Sex, Death and Bowling starring Selma Blair. In 2015, she was cast in the recurring roles in the Netflix crime drama Longmire, and USA Network thriller, Colony. Most recently she appeared as Captain Ava Lafrey in the short-lived Fox horror-comedy sitcom Ghosted from 2017-2018.

In September 2025, Walker was a guest on the Off the Shelf podcast.

Bibliography The Light Runner (2025)

Personal life On June 14, 1997, Walker married John Landgraf, then a producer for NBC, at her parents' home in Santa Fe, New Mexico. The couple has three sons: Walker, Will, and Cal. She has a sister named Elizabeth and a brother named Jim.

Filmography

Film Year Title Role Notes 1988 Aloha Summer Scenes deleted 1991 Eye of the Storm Killer Girl 1991 Ragin' Cajun Kati 1992 Universal Soldier Veronica Roberts 1992 Singles Pam 1993 The Seventh Coin Lisa 1994 When the Bough Breaks Audrey Macleah 1995 Just Looking Sherrie 1995 Someone to Die For Alex Donaldson 1995 While You Were Sleeping Ashley Bartlett Bacon 1995 Steal Big Steal Little Bonnie Martin 1996 Bed of Roses Wendy 1996 Kazaam Alice Connor 1997 Brittle Glory Elise Rosen 1998 Welcome to Hollywood Herself 1999 Happy, Texas Josephine "Joe" McClintock the Banker 2005 For Norman... Wherever You Are Documentary; director and producer 2007 By Appointment Only Val Spencer Also writer 2009 Toe to Toe Claire 2009 Wonderful World Eliza 2013 Angel's Perch Judy 2013 Mischief Night Dr. Pomock 2014 April Rain Linda 2015 Sex, Death and Bowling Director, writer and producer 2020When We Kill the Creators Walker

Television Year Title Role Notes 1988 Santa Barbara Andrea Bedford Series regular (94 episodes) 1989 Swimsuit Romella Television film 1989–1990 True Blue Officer Jessica Haley Series regular (12 episodes) 1990 Matlock Renee Williams Episode: "The Biker" 1990 Jake and the Fatman Josie Episode: "It Never Entered My Mind" (backdoor pilot for Diagnosis Murder) 1991 Perry Mason: The Case of the Fatal Fashion Julia Collier Television film 1991 L.A. LawChristina ShepherdEpisodes: "Pump It Up” and “Mutinies on the Banzai” 1991Tales from the CryptElaine TillmanEpisode: "Mournin' Mess" 1992 The Witches of Eastwick Alexandra Spofford Pilot 1993 Moon Over Miami Gwen Cross Series regular, 13 episodes1996 Wings Melissa Williams Episode: "Love at First Flight" 1996–1999 Profiler Doctor Samantha Waters Series regular (64 episodes)Nominated – Saturn Award for Best Actress on Television (1998) and Best Actress – Television Series Drama (1998) 1999 The Pretender Doctor Samantha Waters Episode: "End Game" 1999 If You Believe Susan Stone Television film 2002 My Wonderful Life Billie Pilot 2005 Sleeper Cell Lynn Ellen Emerson 2 episodes 2006 ER Fran Bevens Episode: "Body & Soul" 2006 The Shield Tori Burke Episode: "Postpartum" 2007 American Dad! Melinda (voice) Episode: "Four Little Words" 2007 Tell Me You Love Me Katie Series regular (10 episodes) 2008 Boston Legal Attorney Phoebe Prentice 2 episodes 2008 Law & Order Gretchen Steel Episode: "Driven" 2009 CSI: Crime Scene Investigation Rita Nettles Episode: "Hog Heaven" 2009 Southland Dr. Merrill Matthews 2 episodes 2010 Law & Order: Special Victims Unit Dr. Fran Stanton Episode: "Conned" 2008–2010 Sons of Anarchy Agent June Stahl 19 episodes 2011 The Protector Gloria Sheppard Series regular (13 episodes) 2014 Taxi Brooklyn Frankie Sullivan Series regular (12 episodes) 2015–2016 Longmire Dr. Donna Monaghan 8 episodes 2016–2018 Colony Helena Goldwin 16 episodes2017–2018GhostedCapt. Ava Lafrey Series regular (16 episodes)

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