Greta Van Susteren is leaving Fox News after 14 years at the network, has confirmed. Her departure will be effective immediately and Brit Hume will take over as anchor of On the Record, beginning Tuesday.

"We are grateful for Greta's many contributions over the years and wish her continued success," Fox News co-presidents Jack Abernethy and Bill Shine said in a joint statement.

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Regarding Hume, Abernethy and Shine said: "As one of the best political analysts in the industry, Brit is the ideal choice to host a nightly political program while the most dynamic and captivating election in recent history unfolds. Having Brit at the helm of this show will enable Fox News to continue on track to have its highest-rated year ever as the network dominates the cable news landscape."

Greta Van SusterenGreta Van Susteren

No official reason was given for Van Susteren's abrupt departure. CNN reports that she had a "key man" clause in her contract that allowed her to depart the network if former CEO Roger Ailes did, and that she activated that clause when Ailes was forced to resign in July amid sexual harassment allegations.