A first-term MP has become the Liberals' newest leader as the ailing NSW party tries to sure up its footing 18 months from a crucial election.

Former TV presenter Kellie Sloane completed her meteoric ascent to the top of the NSW Liberals on Friday after the chaotic aftermath of the federal Liberals' election wipe-out tarnished its state brands and fuelled calls for fresh faces.

Her predecessor, Mark Speakman, finally gave way to the pressure on Thursday, announcing his resignation and throwing his weight behind fellow moderate Ms Sloane.

She was elected unopposed at a party room meeting on Friday morning.

Conservative candidate and Shadow Attorney-General Alister Henskens pulled out earlier.

Former cabinet minister Natalie Ward retained the deputy leadership.

Ms Sloane, a mother of t

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