* Premier Mark McGowan takes on the treasury portfolio, replacing the retired Ben Wyatt

* Roger Cook continues as health minister, also adding state development, jobs and trade to his responsibilities

* Rita Saffioti adds ports to transport and planning portfolios

* Stephen Dawson to serve as mental health and Aboriginal affairs minister

* Paul Papalia moves to police and road safety, David Templeman adds tourism

* John Quigley remains attorney-general, Sue Ellery retains education portfolio, Alannah Mactiernan stays on in regional development

* Reece Whitby becomes emergency services and racing and gaming minister, overseeing the Crown Resorts royal commission

* Amber-Jade Sanderson enters the ministry with responsibility for the environment

* Tony Buti joins as finance minister

* Don Punch and John Carey also to be sworn in as ministers

* Michelle Roberts to become the first female Speaker of the lower house

* Peter Tinley dumped from cabinet, Fran Logan and Mick Murray retired.

Australian Associated Press