Born in Chicago, Illinois, Hawk attended the North Springs Charter School of Arts and Sciences, in Sandy Springs, Georgia. While a student, she appeared in the TV series Reality Check. She received a bachelor of fine arts in theatre from the University of Maryland, College Park in 2004.
At first she found a number of small parts in productions including Law & Order: Special Victims Unit, and Across the Universe.
In 2010, Hawk began her long-running role on Blue Bloods. In that series, she plays Detective 1st Grade Abigail Baker, a member of the Police Commissioner's (Detective) Squad who serves as the primary aide to Police Commissioner Frank Reagan (Tom Selleck). Hawk's character was introduced in the first season of the series (although Detective Baker's name was shown as "Det. Melissa Baker" in the closing credits, it was changed to "Det. Abigail Baker" in subsequent episodes). Since that time, Hawk has appeared in all but a handful of episodes (over 200 through season 11), despite being billed as "Special Guest Star".

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