Mariska Hargitay has starred as Lieutenant Olivia Benson on Law and Order: Special Victims Unit for 22 seasons and counting, and we couldn't imagine the series without her. MORE: Law & Order fans hopeful new spin-off will see the return of this fan favouriteBut what do you know about the 56-year-old TV star's life away from NBC drama? From her famous parents to her loving husband and three adorable children, find out everything you need to know about Mariska Hargitay's family here. . . Charlotte