Megyn Kelly Congratulates Tucker Carlson on Replacing Her at Fox News: 'I Will Be Cheering Him On'

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Fox News is moving on from Megyn Kelly.

The network announced on Thursday that Tucker Carlson will be taking over as host of the 9:00 p.m. ET hour on the Fox News Channel.

WATCH: Megyn Kelly's New Daytime Talk Show Reportedly Replacing Billy Bush's 'Today' Show Time Slot

The announcement comes two days after Kelly revealed she would be leaving the network after 12 years to take on a high-profile gig at NBC News.

Kelly was among the first to congratulate Carlson, who has been a political contributor on Fox News since 2009 and joined the evening lineup in November with the show Tucker Carlson Tonight at 7 p.m.

"Congratulations to my friend @TuckerCarlson on moving to the 9p slot at Fox!" Kelly shared on Twitter. "This is a great decision by FNC & I will be cheering him on!" 

Carlson is set to take over after Kelly does her final edition of The Kelly File on Friday.

RELATED: Rachel Maddow Weighs in on Megyn Kelly's Move to NBC

On Wednesday, reported that Kelly will be replacing the Today show's 9 a.m. hour. A network source reportedly told the outlet that Kelly's new daytime talk show will air in the third hour of NBC's Today show, but the timing on when it will debut is still up in the air. According to the source, the show "will not fall under the Today banner, but instead be Kelly-branded."

In regard to reports that NBC kept many of its high-profile employees in the dark, including Matt Lauer, who, according to PageSix, “blew a gasket” after finding out about Kelly's deal, a source at NBC tells ET "it’s just completely not true."

According to the source, top executives informed Lauer, Savannah Guthrie, Chuck Todd and Lester Holt before the announcement went out. NBC News chairman Andy Lack also kept Today show executive Noah Oppenheim in the loop on Kelly's move to NBC.

WATCH: Megyn Kelly Opens Up About Leaving Fox News for NBC in Emotional Goodbye Message

And while timing is yet to be determined on Kelly's new daytime show, another source at NBC tells ET that "people are worried where she is going to land" and "if she'll take my spot."

The source adds, "There is excitement about her coming, but some talent is 'losing it.'"

Watch Kelly bid farewell to her viewers on Tuesday's episode of The Kelly File.