Since then, he has landed roles in Bones, Medium, Bionic Woman, and CSI: NY, opposite Gary Sinise.
In 2012, Hallisay appeared in two episodes of The CW's series Ringer, and he signed a deal with Lifetime to appear as Kyle Parks in the drama series The Client List.
Hallisay began dating his The Client List co-star Jennifer Love Hewitt in 2012.
On The CW's drama Privileged, Hallisay played Will Davis, a charming and wealthy Palm Beach bachelor who is delighted to learn that his next-door neighbors have hired a beautiful tutor named Megan Smith (Joanna García).
He says, "I was slaving away at that and I had a really good time with it, but it got to the point where I said, "You know, I had always dreamed about seeing what acting was all about." Hallisay made his television debut in 2005, appearing on Fox's The Inside, with Rachel Nichols and Adam Baldwin, as well as Lifetime's Strong Medicine, opposite Patricia Richardson.
His main sources of income are Tv series and movies as well as many endorsement deals.
Just hours after announcing that she is pregnant with her first child, Jennifer Love Hewitt revealed that she is engaged to her co-star boyfriend Brian Hallisay.
The couple is blessed with a beautiful daughter and a son from their beautiful relationship.
The duo lives a happy life with no issue divorce or separation related issue.
He holds an American nationality and belongs to white ethnicity.