03/18/2010 05:12 am ET Updated May 25, 2011

George Stephanpoulous Joins "Good Morning America"

George Stephanopoulos will join "Good Morning America" Monday, ABC announced Thursday.

"I can't wait to join 'Good Morning America's' amazing team, and serve its loyal viewers," Stephanopoulos said in the announcement. "No one can replace Diane Sawyer, but I'll do everything I can to match her unquenchable curiosity and intense commitment to informing the country every morning. What an adventure."

Stephanopoulos and his co-anchor, Robin Roberts, will be joined by news anchor Juju Chang, who will replace Chris Cuomo. Cuomo is headed to "20/20," where he will co-anchor with Elizabeth Vargas, and he will also serve as the network's chief law and justice correspondent. Sam Champion remains weatherman.

Stephanopoulos will remain anchor of ABC's Sunday morning program "This Week" until a replacement is named.

"I am so excited to welcome George and Juju to our family," Roberts said. "The energy and talent of those on camera and behind the scenes at this program are second to none. I have no doubt that George and Juju will immediately feel right at home. Saying goodbye to Diane has not been easy, but I'm glad she will finally be getting more sleep."

"In putting this new 'GMA' team together, we've pursued one goal," ABC News President David Westin said in an e-mail to staff Thursday. "How can we best serve our audience? How can we bring them what matters most to them -- the day's important news, engaging stories, useful information, and real expertise to help them improve their lives?

"Robin and George are the right pair to lead our effort. As we've seen over time, Robin brings a warmth and intelligence to the morning that no one can match. Hers is a practical curiosity that brings the viewers' questions to the fore. George complements Robin's strengths with a deep knowledge of and commitment to news about the nation and the world. George is a formidable interviewer who brings the viewer a deeper understanding of the great issues of the day through his conversations with experts and newsmakers. "