<Tr> <Th> Family </Th> <Td> Joseph Hollister (father) (deceased) Serena Benson (mother) (deceased) Simon Marsden (paternal half - brother) Tracy Harrison (sister - in - law) Ty Harrison (step - nephew) Olivia Marsden (paternal half - niece) Noah Porter Benson (adopted son) </Td> </Tr> <Tr> <Th> Partner </Th> <Td> Elliot Stabler (seasons 1--12) Nick Amaro (seasons 13--15) Amanda Rollins (season 13 - present) </Td> </Tr> <Tr> <Th> Signature </Th> <Td> </Td> </Tr> <P> Olivia Margaret Benson is a fictional character on the NBC police procedural drama Law & Order: Special Victims Unit, portrayed by Mariska Hargitay . Benson holds the rank of Lieutenant and is the Commanding Officer of the Manhattan Special Victims Unit of the New York City Police Department, which operates out of the 16th precinct . </P>

Law and order svu who is olivia dating