They have been elected to Australia's oldest legislative body and already rejoice in the title "The Honourable" but it seems some members of the NSW Parliament's upper house are suffering an identity crisis.

The Christian Democratic Party leader, Reverend Fred Nile, wants to give himself and his fellow members of the Legislative Council the right to use the much grander title of State Senator.

In a rare piece of common ground between parties usually ideologically opposed, the NSW Greens could back Fred Nile's push for a new upper house title. Credit:ABC

And in a rare piece of common ground between parties usually ideologically opposed, the NSW Greens could back Mr Nile's push.

Mr Nile's private members' bill that would make the change is set to be debated by the Parliament, and cabinet will consider the government's position on the matter this week.