Fox News host Megyn Kelly is leaving the cable news network for NBC News, the network announced Tuesday.

Kelly will take on multiple roles at NBC. Shell host a one-hour daytime talk show airing Monday through Friday and a Sunday evening news magazine show, and will contribute on breaking news stories and NBCs coverage of major political and special events.

Megyn is an exceptional journalist and news anchor, who has had an extraordinary career, Andrew Lack, chairman of the NBCUniversal News Group, said in a release. Shes demonstrated tremendous skill and poise, and were lucky to have her.

The departure is a major blow to Fox News, where Kelly hosted a top-rated 9 p.m. show and was considered a key part of the networks future.

In a Facebook post, Kelly said she was incredibly enriched for the experiences she had in a dozen years at Fox News. Shell wrap up her last episode of The Kelly File on Friday.

A former litigator, Kelly joined Fox News as a Washington-based correspondent in 2004. She later moved to co-anchoring in the morning, and in 2010, hosted her own show from 1 to 3 p.m. Kellys coverage at the time often echoed the broader Fox News worldview, such as her obsessive focus on the fringe New Black Panther Party. She also came under fire in 2013 after asserting that Jesus and Santa Claus were white.

In recent years, Kelly repositioned herself as an independent voice among Fox News more partisan talkers and joined news anchors Bret Baier and Chris Wallace to moderate debates and steer election night coverage. She was the subject of a January 2015 New York Times Magazine cover story that highlighted her tendency to stray from Fox News orthodoxy and the reputation she has gained for aggressively challenging figures on both sides of the aisle.