Diane Sawyer has held down the anchor desk at  ABC World News since 2009 but will step into a new role beginning September 2nd. Sawyer will now take on big issues, create innovative specials according to James Goldston, ABC News President.

"Diane’s incredible work on 'Hidden America' and her masterful interviews with Gabby Giffords, Malala Yousafzai and recently Hillary Clinton bring great distinction to the entire news division," Goldston said. "Her curiosity, passion and energy inspire us all. Diane is one of the giants of modern journalism, and we can’t wait to see where she'll lead us next."

With Sawyer moving on, who will take over the World News anchor position?

David Muir will become the anchor and managing editor of World Newsin September, and George Stephanopoulos was named chief anchor of ABC News, leading the network's coverage of breaking news and special events.

In the meantime Muir will continue to anchor 20/20 with Elizabeth Vargas.

"For more than a decade, David has been front and center reporting on the biggest stories of our time, helping drive us forward with tireless dedication, hard work and good humor," Goldston said. "From Katrina to Egypt's Tahrir Square, from Fukushima to Newtown, David has carefully guided our viewers through tragedy and world events with his tough questions and trademark compassion."

Stephanopoulos will become chief anchor of ABC news.Stephanopoulos will take on the responsibility of being the network's lead anchor for major special events and breaking news.

"There is simply no better political journalist on television today," Goldston said. "That is why George will once again lead our election coverage starting with the mid-terms this Fall and onwards to the 2016 presidential race and beyond. The news division could not be in stronger hands with George in his new role."

Stephanopoulos, who was a key player in helping to drive Good Morning America forward to No. 1, will continue to anchor the show, along with This Week, which has moved into its best competitive position in a generation.