In the midst of ABC News making big changes, the veteran broadcaster Diane Sawyer is stepping down as 'World New' anchor.

But the 68 year-old isn't leaving the network altogether.

40 year-old understudy David Muir has been announced as Sawyer's replacement as she will go on to "lead new programming tackling big issues and extraordinary interviews," ABC reports.

The anchor of 'Good Morning America' and 'This Week,' George Stephanopoulos, has landed the role of chief anchor of ABC News, in this new position he will "handle special reports and breaking news."

"We have an extraordinary team of anchors who are gifted storytellers and uniquely skilled broadcasters," said James Goldston, president, ABC News. "For years to come, they will inspire us all to do our best work and set a high bar for excellence to inform, empower and inspire our viewers."

Sawyer was posted as 'World News' anchor for around five years, but her decision to step down was fuelled by her desire to concentrate on new programming for the news network. The new role will require her to "create and commission original reporting and major interviews for all ABC News programs and platforms."

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"After wonderful years at "World News" I decided it is time to move to a new full time role at ABC News. I'll be joined by an incredible team of journalists dedicated to enterprise reporting, innovative approaches to breaking news and new ways of thinking about big issues and events around the world," Sawyer said. "I can't wait to continue bringing more of my specials to prime time and appearing on all ABC News broadcasts, as well. And to my friends and colleagues George and David - congratulations. I look forward to exciting work together and great times ahead."

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Goldstein assured that Diane will still be a "driving force" for ABC as she is "one of the giants of modern journalism." Adding, "Her curiosity, passion and energy are unmatched, and I can't wait to see where she'll lead us next."

dIANE Sawyer
Sawyer has stepped down as ABC's 'World News' anchor