The former co-stars exchanged vows in front of family and friends in Malibu Canyon, California on Saturday, reported Us Weekly.
"It was everything we wanted it to be and it was so nice after so many years together to finally celebrate our relationship with all of our friends and family," Park, 29, said.
"It's nice to have everyone we love in one place finally for all these years to celebrate our love for each other."
They had fall as theme of the wedding. There was no bridesmaids or groomsmen.
Park and Hilton met on the set of "Charlie Bartlett" in 2006. They announced the engagement in January this year. He proposed to her using a family heirloom, his great-grandmother's ring.