Jennifer Aniston chopped off her long locks because she was "bored."

The We're the Millers actress debuted a chic blonde bob on Monday while running errands in Los Angeles, which came as a surprise after years of wearing her trademark honey-colored hair down past her shoulders.

She told Vogue magazine the radical change was a spur-of-the-moment decision, saying, "I'm always one of those girls who does a big old chop just to get it really healthy, to repair all the [damage from] hair coloring and stuff like that. And I just got bored, honestly. It's fun to change it up once in awhile."

The We're The Millers actress also revealed her transformation was the result of her addiction to Brazilian blow dries, which use a combination of formaldehyde and keratin to keep locks straight for up to three months. Before stepping out in public with her shorter cut, Jennifer explained to Elle magazine, "It wasn't for a role. My hair went through a phase - this thing called a Brazilian and my hair did not react really well to it."

The star - who is engaged to Justin Theroux - has no regrets about getting six inches taken off her hair length: "I did it! I feel great. I feel lighter. It's simple, it's really simple, that's for sure."

Jennifer is famed for her sleek and shiny hair, which caused a worldwide craze in the 90s when fans of popular sitcom Friends copied her iconic layered bob, which became known as The Rachel after her character in the show. The brunette is also a spokesperson and part-owner of haircare company Living Proof.