She will also be working with the NBC News teams to help develop her weekday news program ahead of its premiere.
In 1977, Beckel joined the United States Department of State as deputy assistant secretary of state for congressional relations, becoming the youngest deputy assistant secretary of state in the Carter administration.
It will also be a relatively easy office move for Kelly, as Fox News headquarters is just two blocks away from Rockefeller Center, which is the home of NBC.
It was Vanity Fair that first reported Kelly was in talks with NBC in a story published last month about the 'last-minute suitors' looking to hire Kelly.
The news of Kelly's departure from Fox News for a post at NBC now puts to an end months of speculation about the future of the popular host.
It also marks a remarkable ascent for Kelly, who got into the field later in life after becoming disillusioned with her career as an attorney.