Liza Harvey has been elected unopposed as leader of the Liberal party in Western Australia following the resignation of Mike Nahan.
Bill Marmion has been chosen as the deputy leader over Tony Krsticevic but the results of the ballot have not been revealed by the party.
Ms Harvey, a widow and mother, is the first woman to lead the WA Liberals.
She was a senior minister under the Barnett government and has long been tipped as a leader.
Senior Labor minister Alannah MacTiernan tweeted her congratulations to Ms Harvey, saying it was a “great breakthrough for women in the Liberal party”.
Dr Nahan, the Michigan-born former state treasurer, took on the opposition leader role after the Barnett government suffered a thumping election loss in 2017.