AOL just announced that it has appointed Susan Lyne CEO of its brand group, and she will run the AOL operating unit that houses the company’s portfolio of brands.

There were already rumors being reported that she would be taking over all AOL content other than Huffington Post, though the company didn’t specifically mention this in its announcement. TechCrunch shares a company memo, however, which indicates that Arianna Huffington will still report to Tim Armstrong.

“In her roles as CEO then Chairman of Gilt, and previously as President and CEO of Martha Stewart Living Omnimedia, Susan has a proven track record of brand building and aggressive growth,” said AOL CEO Tim Armstrong. “I know she’ll bring that same drive and growth-oriented mentality to our Brand Group. AOL ended 2012 growing revenue for the first time in eight years, and we expect Susan to help build on this momentum and take our brands to the next level.”

“In my three years as an AOL board member, I have partnered with Tim Armstrong and my fellow directors to help drive the company’s transformation, and have seen AOL make great strides as it continues to innovate, grow and evolve,” said Lyne. “I’m looking forward to contributing to the company’s continued evolution in my new role, and will focus on creating additional value with all of AOL’s premium brands. Our efforts center on making all of our brands true destinations for audiences worldwide, and to provide marketers with innovative opportunities to connect with these audiences.”

Lyne will remain Vice Chairman of Gilt, a role she recently transitioned to from Chairman.

She has also served as President of ABC Entertainment, overseeing the development of shows like Desperate Housewives, Lost, and Grey’s Anatomy. Not bad experience to have as AOL continues to make a big video push.

AOL’s Chief Operating Officer, Arthur “Artie” Minson, who previously oversaw all three of AOL’s business unites: the Membership Group, AOL Networks, and the Brand Group, is stepping down. He will remain with the company for a transition period.