Jeremy Paxman said he is quitting the flagship current affairs show Newsnight and would like to "go to bed at much the same time as most people".
The broadcaster, one of the most familiar faces on the BBC2 show, is one of the corporation's biggest stars.
In a statement, he said: "I have decided it is time to move on from Newsnight. After 25 years, I should rather like to go to bed at much the same time as most people.
"This was a decision I reached - and informed the BBC of - last July. I shall work out the remainder of my contract and will not seek another.
"It's been fun. I have had the pleasure of working with lots of clever, creative and amusing people. I think I've been lucky and wish the programme well."