George Stephanopoulos has been named the new anchor of “Good Morning America,” ABC News President David Westin announced today.

Stephanopoulos will anchor the broadcast with Robin Roberts and replaces Diane Sawyer, who will become the new anchor of “World News” beginning Dec. 21. Juju Chang has been named the news anchor for “Good Morning America” and Chris Cuomo has been promoted to co-anchor of “20/20″ alongside Elizabeth Vargas. Cuomo has also been named ABC News’ chief law and justice correspondent, reporting for all broadcasts and platforms across the news division. Sam Champion will remain the weather anchor on the morning show.

George will take on the role of chief political correspondent and continue to anchor “This Week” until a replacement is named.