Allison Jones · The Canadian Press

· Posted: May 25, 2026 7:54 AM EDT | Last Updated: 4 hours ago

Ontario cabinet minister Caroline Mulroney has announced that she is resigning, citing a desire to start a new chapter.

Mulroney was elected in 2018 as part of Premier Doug Ford's first government and has served in a number of cabinet portfolios, including attorney general, transportation, francophone affairs, and currently president of the Treasury Board.

In a public letter Monday, Mulroney said her decision comes two years after losing her father, former prime minister Brian Mulroney, and now as she and her husband are empty nesters.

"Together, they have led me to the conclusion that now is the right time to step back from elected life and begin a new chapter, one I am genuinely excited about," Mulroney wrote.

During question period Monday, Mulroney took a moment to acknowledge her resignation and thank her colleagues at Queen's Park.

"Serving this house has been one of the greatest privileges of my life," she said. "I am so proud of all the important work we have accomplished together on behalf of Ontarians."

Ford said in a statement that Ontario is lucky to have benefitted from Mulroney's calm and steady leadership.

"Politics is in Caroline's blood," he wrote. "The Ontario PC Party and our conservative movement will no doubt continue to benefit from her ideas and ideals."

He has tapped Finance Minister Peter Bethlenfalvy to serve as interim president of the Treasury Board once Mulroney's resignation takes effect on June 5. Long-Term Care Minister Natalia Kusendova-Bashta will take over as minister of francophone affairs, Ford's office said in a separate statement.

Mulroney's resignation will trigger a byelection in her riding of York-Simcoe, in addition to one in Scarborough Southwest that Ford must call by the end of summer.

Ontario Premier Doug Ford released a statement Monday, calling Caroline Mulroney a close, personal friend who provided the province with calm, steady leadership. (Frank Gunn/The Canadian Press)

Ford said Mulroney leaves a record she can be proud of, including a funding agreement for the largest expansion of public transit in North America.

Mulroney reflected fondly in her letter on her time as francophone affairs minister, a portfolio she held through the full eight years, though it began with a bumpy start, presiding over some funding cuts in 2018.

"There is an old line in politics that the worst day in elected life is better than the best day outside of it," she wrote in closing her letter.

"I'm not sure that's true, but I do know that I will miss the people I have worked with over the past eight years more than you know."