Judges will now get to choose if they want to wear their ceremonial wigs or not.
The removal of an obligation to wear the wigs is part of a move to modernise the courts.
Minister for Justice Alan Shatter signed into law the two new Statutory Instruments proposed by the Court Rules Committees to make the wearing of ceremonial wigs optional in the courts.
The new rules come into effect from tomorrow.
Mr Shatter said: "I warmly welcome this initiative from the Chief Justice and the Presidents of the High and Circuit Courts to dispense with the compulsory wearing of wigs by judges in court.
"It should be recognised as a further small but significant step in the ongoing process of reform."