Born on October 31, 1978 in Washington, D.C.
Brian graduated, at the age of 18, from Gonzaga College High School in 1996 and went on to pursue a degree in Economics and History from Cornell, graduating in 2000.
Brian Hallisay began his career in show business by appearing in The inside - Dans la tête des tueurs (2005) episode, The inside - Dans la tête des tueurs: Aidan (2005), playing "Jake Carrington", with Rachel Nichols and Adam Baldwin. He was next seen as "Dr. George Harmon" on the Lifetime network's series, La vie avant tout (2000), in the episode, La vie avant tout: Chief Complaints (2005). In 2006, he was given a role in the Kevin Rodney Sullivan-directed TV movie, A.K.A. (2006), a crime drama which also starred John Leguizamo. Hallisay made his feature film debut in the comedy, Bottoms Up (2006), where he portrayed "Hayden Field", alongside Jason Mewes, David Keith and Paris Hilton. This was followed by a series of television appearances. He was in Jerry Bruckheimer's FBI - Portés disparus (2002) as "Alex Stark", Meredith Stiehm's Cold Case: Affaires classées (2003) and Les experts: Manhattan (2004) opposite Gary Sinise. He was also given a guest spot in the drama series, Bones (2005), which stars Emily Deschanel and David Boreanaz. His next project became Bionic Woman (2007), where he played "Dr. Mark Stevens" for the 2007 episode, Bionic Woman: Faceoff (2007). In 2008, he was given the role of "Ryan Haas" in Médium (2005), an NBC drama series starring Patricia Arquette. Hallisay was then approached to play the role of the wealthy and charming bachelor "Will Davis" in The CW's Privileged (2008). Will Davis is the potential love interest of the lead character, the smart and endearing "Megan Smith", played by JoAnna Garcia Swisher. After "Privileged" was canceled, he went on to another television series, The Client List (2012), starring Jennifer Love Hewitt, where he played her ex-husband. In real life, he and Hewitt became engaged in 2013.
