Former leader of the Ulster Unionist Party Lord Trimble will not be standing in the forthcoming elections to the Northern Ireland Assembly.
David Trimble has been elevated to the House of Lords
The move, confirmed by the party, was expected following his elevation to the House of Lords earlier this year.
Mr Trimble was Northern Ireland's only first minister. He was leader of the Ulster Unionist Party for 10 years from 1995.
The next assembly elections are due to take place on 7 March.
Mr Trimble won a Nobel Peace Prize for his part in the 1998 Good Friday Agreement.
He stepped down as leader of the Ulster Unionist Party, after losing his Westminster seat in Upper Bann in the 2005 general election.
In total, the Ulster Unionist Party lost four of its seats in the poll.