2:04 p.m. EST November 6, 2013  Her longtime hairstylist says she wanted something that was easy and natural. Go short, or go home. That was the philosophy behind Jennifer Aniston's new 'do.

"She cut her hair. She just wanted something new and modern and wanted to cut her hair. That's all," says her best friend and hairstylist Chris McMillan, who arrived at Aniston's Los Angeles home to wield the scissors.

"This one was a big cut so we did it at her house in the bathroom, just the two of us. It's usually the best way. We cut it and took it slow," says McMillan. "We knew we were going shorter. She was like, 'OK, shorter. We've gone this far so let's keep going.' It was a collaboration between the two of us. Jen could possibly be a hairdresser. She's that good. I've created a monster."

Paparazzi photos surfaced earlier this week, but in fact, the cut was completed "last week. She just wanted something new and modern and wanted to cut her hair," says McMillan. "We'd been throwing around pictures. We sent each other pictures that we liked. I call this a chewed-off bob. It's not precious. It's got lots of bits and ends and pieces. It's shorter in the back and longer in the front. She's really over blow-drying her hair. She wanted to towel dry and put some product in and leave it alone."

Aniston is a partner in the hair line Living Proof, and she uses the products on herself. McMillan says her 'do is a reflection of her less-is-way-more style.

"She likes to look natural and easy and effortless. She's a low-maintenance girl when it comes to her hair and makeup. She definitely takes time to get ready. But it doesn't take her an hour," says McMillan. "She does her makeup really quickly. She's got great skin, very healthy. She does lots of mascara. The most time she takes is figuring out which pair of jeans to wear and which jacket."