Britney Spears made the first move on her fiance Jason Trawick while the pair were watching a Chucky movie.

The 'Toxic' hitmaker began dating her former agent in 2010 and insisted he didn't instigate the relationship because it would have been unethical although they were close friends before getting romantically involved.

Speaking in a joint interview with US Elle magazine, where the couple revealed their choice of movie, he said: ''I was your agent at the time so I was definitely not going to cross any boundaries.

''We were watching - you don't remember? It was in Vegas. We always used to watch movies together as friends and you know it wasn't out of the ordinary for her to just lie next to me. So it was like every typical time.

''It was kind of one of those things where she moved, like, turned around, so we were face-to-face and then...''

However, Britney interrupted him to say: ''OK, that's enough information, sweetie. It was sweet, just say that.''

Britney was previously briefly married to childhood pal Jason Alexander and to former back-up dancer KEVIN FEDERLINE with whom she has two kids, Sean Preston and Jayden James.