What's going on over at Seventeen magazine? First comes the news that Atoosa Rubenstein's tight staffer, fashion director Beau Quillian, has left the 'Toos' side. He hasn't lined up a new position yet, which makes us think this was a pretty hasty move … but the orchid of an EIC isn't giving anything away.

“We’re looking forward to figuring out who is the best fit for us full time,” she said. “Beau is my dear friend and was a critical part of creating the ‘new’ Seventeen. I’m looking forward to continuing our working relationship in its new incarnation.”

Meanwhile, we also hear that the mag's executive editor Leslie Heilbrunn – an import from CosmoGIRL, a la Atoosa – also left, to pursue her dreams of becoming a chef. Her replacement: Jillian MacKenzie from Allure. The reason for all the moving around? Hello, September is "promotions month," claims a Seventeen insider. Looks like it might also be, "take your former staffers off your Top 8" month as well.

Seventeen Minus One [Fashion Week Daily]
Earlier: Packing & Partying With Atoosa Rubenstein