Greene lives in Los Angeles with his son Oliver and is engaged to his girlfriend, Kate Austin, to whom he proposed in May 2019 in Italy. He and Austin have a son they named Austin. Austin Greene was born on December 12, 2021. Paul Greene loves playing beach volleyball with Ollie and watching the sunset; he also loves playing the guitar and singing. His mother is from the Netherlands; she was a nurse and has played in some of Greene's movies as an extra. His father died of ALS in 2014.