|Date of Birth||December 1, 1966|
|Origin||New Orleans, Louisiana, USA|
LaNasa was born in New Orleans, Louisiana, the daughter of Anne (née Hardin) and Dr. James J. LaNasa, Jr., a surgeon. She began dancing at the age of 12, and at the age of 14, she was accepted to the North Carolina School of the Arts in Winston-Salem, North Carolina. After an apprenticeship with Milwaukee Ballet, LaNasa danced with Salt Lake City's Ballet West and the Karole Armitage Ballet.
LaNasa made her feature film debut with a small role in the 1990 film Catchfire. She guest starred on number of television series, including Seinfeld, 3rd Rock from the Sun or Touched by an Angel, and in 2001 landed the lead role of Bess Bernstein-Flynn Keats in the NBC comedy series Three Sisters (2001–2002). She later had recurring roles in Judging Amy, The Guardian, and NYPD Blue. Her other television credits include guest roles on CSI: Crime Scene Investigation, Grey's Anatomy, House M.D., or Two and a Half Men. LaNasa also had series regular roles in short-lived CBS comedy-drama Love Monkey (2006), and on HBO comedy 12 Miles of Bad Road. She also appeared as Beverly Ford on Big Love from 2009 to 2011.
LaNasa appeared in number of motion pictures during her career. In 2011, she has booked roles in the 2012 political comedy The Campaign, and 2013 thriller The Frozen Ground. In 2012, LaNasa was cast in the NBC series Deception, which premiered as a mid-season replacement during the 2012–13 television season. Also she appeared in recurring role on A&E series Longmire from 2012 to 2013. On November, 2013 LaNasa was cast as series regular in the USA Network drama Satisfaction. On October, 2014, she was cast alongside Ana Ortiz in the gay-drama, Love is All You Need?, based on the 2011 short film with the same name. In 2016, she has been cast on Devious Maids.
LaNasa, at the age of age 22, married 53-year-old actor Dennis Hopper in June 1989; the couple divorced in April 1992. Hopper and LaNasa had a son, Henry Lee Hopper (born 1990). On May 19, 1998, she married comedic actor French Stewart. The two later divorced. In July 2012, LaNasa became engaged to actor Grant Show, marrying him a few weeks later, on August 18. She gave birth to the couple's first child, daughter Eloise McCue, on March 21, 2014.