Sources have confirmed to Fox News that South Carolina Gov. Nikki Haley, New Mexico Gov. Susanna Martinez and former Secretary of State Condoleezza Rice will be announced as top speakers at the upcoming Republican National Convention.

Sources did not disclose any time or dates of the speakers.

The speaker lineup is rounded out by Florida Gov. Rick Scott, Arizona Sen. John McCain, former Arkansas Gov. Mike Huckabee and Ohio Gov. John Kasich, according to a report in the Tampa Bay Times, confirmed by a GOP/RNC official.

Fox News' Chad Pergram and Jake Gibson contributed to this report.