Graham Norton's chat show is to move to BBC1 as part of plans to raise his profile as a face of the BBC.
But the channel's controller insisted that the move was not a threat to Jonathan Ross, whose chat show is also on BBC1.
BBC1 controller Jay Hunt said that 'The Graham Norton Show' will move in the autumn from BBC2 to a 10.35pm weekday slot on BBC1.
Norton recently provided the commentary for this year's 'Eurovision Song Contest', taking over from Terry Wogan.
Ms Hunt described Norton as a "unique talent" and said the changes would give him the chance to be the "zany person" people saw him as on Channel 4.
Ms Hunt said that the decision did not mean that Norton would have a mandate to be rude and vulgar.
She said "Graham is fantastically good at engaging with audiences."