Margaret Cassidy Lawson (born August 12, 1980) is an American actress who is best known for her role as Detective Juliet "Jules" O'Hara in the TV show Psych. From 2018 to 2019, she held the recurring role of Nathalie Flynn on Fox's Lethal Weapons third and final season. Career Lawson started her career at the age of 8 in local community and dinner theater productions. She later became a youth TV host on WDRB Fox 41 Kid's Club in Louisville, and moved to Los Angeles for her first pilot at 15. In 2011, Lawson briefly returned to her roots in theater to star in the play Greedy, directed by James Roday, which played for a few weekends in Los Angeles. Lawson starred in various sitcoms like Cybill, Boy Meets World and Home Improvement throughout her early career in both guest starring and supporting roles. She also made guest appearances on television series such as Smallville and Fear Itself, and co-starred in It's All Relative and Crumbs. For The Wonderful World of Disney, Lawson starred in a double role in Model Behavior featuring Justin Timberlake, and in the 2002 installment of Nancy Drew in the title role. Other film credits include Pleasantville, Nice Guys Sleep Alone and Cleaner. From 2006 to 2014, Lawson co-starred in the USA Network original series, Psych, as Detective Juliet O'Hara. She reprised her role in 2017 in Psych: The Movie, in Psych 2: Lassie Come Home in 2020 and Psych 3: This Is Gus, in 2021. Following Psych, she scored leading roles in ABC's 2013 sitcom Back in the Game, CBS's 2014 sitcom pilot Save the Date and CBS's 2016 fantasy sitcom Angel from Hell. She also had short arcs on Two and a Half Men, The Great Indoors, and Netflix's The Ranch. Also for Netflix, Lawson starred in the recurring role of Christa on the second and third seasons of horror-comedy series Santa Clarita Diet as well as the movie Spivak in 2018. For Hallmark Channel, Lawson has starred in My Favorite Wedding and Christmas Encore in 2017, The Story of Us and Christmas in Evergreen: Tidings of Joy in 2019. Most recently, Lawson starred in a recurring role as Dr. Natalie Flynn on the 3rd season of Lethal Weapon and was featured in Treehouse, the 6th episode of Hulu's monthly horror movie anthology Into The Dark. In 2020 she played Kay, the female lead