Ben Carson, who dropped out of the Republican presidential race just last week, will endorse front-runner Donald Trump on Friday.
Trump confirmed the endorsement during the Republican presidential debate Thursday night.
The retired neurosurgeon plans to hold a press conference at 9 a.m. ET Friday to announce his support, sources told Fox News.
The backing from the outsider ex-candidate, who captivated conservative voters with his unconventional campaign, could give Trump a boost as the candidates charge into critical primaries next Tuesday in Florida, Ohio and three other states.