The "Wanderlust" actress, who has been dating Justin since May last year, has organised a romantic two-week getaway last month so that he could experience the beauty of the continent, reported Femalefirst.
The pair began their trip in Paris on June 10, where they were spotted holding hands underneath the Eiffel Tower, before jetting off to Rome to explore the Italian city.
"She wants to take Justin to some of her favourite places. She and Justin are extremely happy with where they are right now, and are in it for the long haul," a source said.