Jennifer Aniston decided to cut off her famous locks because it was "time for a change".

The 'Just Go with It' actress unveiled a chin-length bob style while promoting her latest movie earlier this week and her longtime hairstylist Chris McMillan revealed the star had become bored with her trademark longer style.

He told allure.com: "It was just time for a change. We had a blast doing it. And we've always liked this haircut. It's about keeping things simple. The way Celine and Calvin Klein and Jil Sander and all these clothing lines are keeping it really simple and chic. I really feel that fashion right now. All the styles are back to when I first started doing hair. And I love it."

While Jennifer - whose hair is also noticeably blonder than before - is famous for her sleek blow-dried hair, Chris revealed she is looking forward to showing off a more natural style with her latest cut.

He explained: "We did blow it out for press, but we're excited to go kind of natural, like Kim Basinger in '9 1/2 Weeks'.

"It's so funny. This is something that happens all the time: Whenever I cut someone's hair, they say, 'My colour looks so much better.' The colour kind of freshens up when you get a drastic haircut."

Chris also revealed another reason for Jennifer's new do - she was afraid her previous layered style made her look like a reality TV contestant.

He said: "I'm loving bobs again. I love the girl in the YSL ads. It's a sexy look. The reason that I'm loving a bob at the moment... There are so many long, layered hairstyles and - don't get me wrong, I love that. But 'The Real Housewives of Beverly Hills 'all have that. You know what I mean? And what's the opposite direction you can go in?"