Jennifer Aniston thought Justin Theroux was "like a serial killer"
The 43-year-old actress - who has been dating her `Wanderlust` co-star for just over a year - thought she could see a "dark" side to the actor but quickly learned he is the "nicest person in the world".
Speaking about their first encounter, which took place on the set of 2007 movie `Wanderlust`, she said: "I met Justin about five years ago and I thought he was very sweet and he was always very nice.
"But I remember thinking he was very dark. At first you think he could be like a serial killer, but he is actually the nicest person in the world."
Jennifer admitted she "didn`t recognise" Justin when they met again to work on `Wanderlust` as he had a bushy beard and long hair for the role, but she insists that is part of the 40-year-old star`s appeal.
She added n an interview with Pop Sugar: "That`s what`s so great about him. He can do different looks and he just disappears."