Essence editor in chief Constance White is leaving the magazine, as are beauty editor Corynne L. Corbett and creative director Greg Monfries. Executive editor Vanessa Bush will take over White’s responsibilities as interim managing editor. White joined the title in 2011 after a stint at eBay.

Siobhan O’Connor has been promoted to executive editor at Prevention magazine, as well as its web site Prevention.com. O’Connor joined the magazine in 2010 and was most recently Prevention.com’s deputy editor.

Men’s Health magazine has made two promotions, naming Randi Siegel and Chris Peel advertising directors. Siegel was previously executive fashion director, while Peel was advertising sales manager.

Parade magazine has brought in Michelle Morris as vice president and Midwest manager, based in Chicago. Morris had been Midwest director at New York Media.

Media agency Spark SMG has named Harold Dawson executive vice president and managing director, a newly created position. Dawson joins from Initiative, where he was senior vice president and group media director.

San Francisco digital agency EVB has named Steve Babcock executive creative director, replacing Stephen Goldblatt, who is now chief digital officer at Mullen. Babcock was previously vice president and executive creative director at Crispin Porter + Bogusky.

Kara Fitzsimmons has been named partner at MFD Communications, a consulting firm that specializes in media training. Fitzsimmons was most recently managing director for media relations at Knight Capital Group.

ABC News has landed the first TV interview with Amanda Knox, who in 2009 was convicted in France of killing her British roommate, before a court appeal eventually overturned the decision. Knox will sit down with Diane Sawyer for an interview to air as a primetime special on April 30.

Marcy Ross, executive vice president of current programming at Fox, is leaving the network to pursue work in the creative area of TV. Ross will remain with the network as a consultant during a transition period.

NBC has added Christina Ricci to the cast of its comedy pilot “Girlfriend in a Coma,” playing a woman who wakes up from a coma and learns she has a teenage daughter. Ricci’s most recent TV appearance was a guest role on CBS’s “The Good Wife,” and before that she starred in ABC’s “Pan Am.”

Actor Jonathan Banks has joined the cast of NBC’s drama pilot “Bloodline,” about two families at war. Banks most recently appeared in AMC’s “Breaking Bad.”

Radio distributor Dial Global has altered its management structure, naming Spencer Brown the company’s sole chief executive officer. Former co-CEO Ken Williams becomes the company’s president, while fellow former co-CEO David Landau has resigned.

Mark O’Brien has been named market manager at Cumulus Media, in charge of the Washington, D.C., market. O’Brien had been vice president and market manager for Jacksonville, Fla., at Clear Channel.

Actor Chris Cooper has signed on to star in Discovery Channel’s upcoming miniseries “Klondike,” a gold-rush drama set in the 1890s. Production on the project begins next month in Canada.

Tags: Amanda Knox, Christina Ricci, Constance White, diane sawyer, Greg Monfries, Kara Fitzsimmons, Marcy Ross, Spencer Brown, Steve Babcock