Angela Bromstad Angela Bromstad

Angela Bromstad, prime time entertainment president of NBC and Universal Media Studios, is leaving the network.

"Today I wanted to let you know that I'm leaving NBC Universal," Bromstad wrote in an e-mail to her staff Thursday, obtained by The Hollywood Reporter. "I cannot possibly sum up my thoughts and emotions in an e-mail but suffice it to say I have tremendous respect for the company and for the people with whom I have had the privilege to work with and know during my time here. I take great memories and friendships with me and I wish you all the best going forward."

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Her departure is part of a major companywide restructuring, as NBC Universal's planned merger with cable giant Comcast nears its close. On Tuesday, the Federal Communications Commission and the Justice Department approved the $13.8 billion deal.As part of the merger, former Showtime President Robert Greenblatt

had previously been named to replace Jeff Gaspin as chairman of NBC Universal TV Entertainment, and Comcast CEO Steve Burke will replace Jeff Zucker, the CEO of NBC Universal since 2007.

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This is the second time in four years Bromstad has left NBC. In 2007, Bromstad, then president of NBC's television production studio, quit when she was passed over for a promotion. After running NBCU's U.K. production office, she returned in January 2009 as NBC's chief programmer of dramas and comedies.Bromstad's first two projects were Parks and Recreation and Southland, both critically acclaimed but little-watched. NBC later canceled Southland while it was in the middle of production for its second season; TNT then picked up the cop drama.Bromstad was not part of the ill-fated decision to move Jay Leno to the 10 p.m. slot and had expressed her reservations. She later told the Los Angeles Times that she was comfortable with the plan because the show would provide an alternative to the dramas and local newscasts that occupy the hour on other networks.During her two-year tenure, Bromstad also developed such shows as Parenthood, Law & Order: Los Angeles, Chase and The Event. Most recently, she added a third Thursday night comedy hour, which begins this week.