Premier-designate Kathleen Wynne is set to unveil her new cabinet this afternoon, including the expected appointment of leadership rival Charles Sousa as her finance minister, according to government sources.

In a statement on Monday ahead of the announcement, a spokesperson for Wynne said: "This is the cabinet Kathleen wanted and always planned on."

The expected appointment of Sousa, the MPP for Mississauga South, to the finance post being vacated by Dwight Duncan may be seen by many as the result of his endorsement of Wynne at the leadership convention.

Wynne's spokesperson also added that the premier-designate feels Sandra Pupatello "has lots to offer," but her leadership rival "is still considering her options."

Wynne's new cabinet will be officially announced Monday afternoon, but details started to leak on Sunday evening.

Government sources have also told CBC News that Ottawa West-Nepean MPP Bob Chiarelli will take over the energy portfolio, while Toronto Centre MPP Glen Murray will be the minister of transportation and infrastructure.

Like Sousa, Murray had also sought the leadership of the Ontario Liberal Party. But he dropped out of the leadership race ahead of the convention and threw his support behind Wynne.

Wynne will also put first-time cabinet minister, Guelph MPP Liz Sandals, into the education portfolio, while Education Minister Laurel Broten will become the minister of intergovernmental affairs.

Sandals served as the head of a local school board and also as the president of the Ontario Public School Boards' Association, prior to being elected as an MPP in 2003.

The governing Liberals have hit a rough patch in their relationship with the province’s public teachers after using controversial legislation to impose contracts upon them.

Yasir Naqvi, MPP for Ottawa Centre and the president of the Ontario Liberal Party, will enter cabinet as the new labour minister. He has also not previously served as a cabinet minister.

Government sources also say that Health Minister Deb Matthews will keep her portfolio.

Matthews had supported Wynne during her leadership bid.

Wynne officially becomes the premier of Ontario on Monday. She has promised to serve as the province’s agriculture minister at the same time.

The incoming premier and her cabinet are due to be sworn in at the legislature at 3 p.m. ET. Wynne is expected to speak to the media later in the afternoon.

Prominent ministers leaving cabinet

Several cabinet ministers who served under Premier Dalton McGuinty have announced their exit from the provincial government.

Duncan, the longtime finance minister, announced last week that he will resign from his Windsor — Tecumseh seat on Thursday.

Energy Minister Chris Bentley, the MPP for London West, has also stepped down. His resignation also takes effect on Thursday.

Northern Development and Mines Minister Rick Bartolucci says he won’t run again in the next provincial election and he no longer wants to be in cabinet.

McGuinty announced his intention to step down as leader of the Ontario Liberal Party last fall.

He agreed to stay on until the party chose a successor.

Wynne won the party leadership at a leadership convention in Toronto late last month. When she is officially sworn in on Monday, she will be the first female premier in Ontario's history.

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  • Ontario Premier Dalton McGuinty, right, congratulates incoming premier Kathleen Wynne at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Kathleen Wynne reacts after becoming the new leader of the Ontario Liberal party at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013. The 59-year-old Toronto politician will be the province's first female and openly gay premier.

  • Sandra Pupatello, right, congratulates Kathleen Wynne after Wynne becomes the new leader of the Ontario Liberal party at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Kathleen Wynne, left, and her spouse Jane Rounthwaite stand together on stage at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Ontario Liberal Party leadership candidate Kathleen Wynne celebrates with fellow candidates Eric Hoskins (left), Gerard Kennedy (right) and Charles Sousa after they gave her their support at the convention in Toronto on Saturday January 26, 2013.

  • Ontario Liberal Party leadership candidate Kathleen Wynne reacts to the results of the second ballot at the convention in Toronto on Saturday January 26, 2013.

  • Sandra Pupatello, right, talks on her phone next to Ontario Finance Minister Dwight Duncan, left, at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Before and After

    What the street outside the convention usually looks like and what it looked like during a <a href="http://www.huffingtonpost.ca/2013/01/26/ontario-liberal-convention-protest_n_2556296.html?utm_hp_ref=canada-politics">protest held by Ontario teachers and unions</a> on Saturday afternoon.

  • An Ontario Liberal Party delegate is heckled as protesters gather outside Toronto's Maple Leaf Gardens on Saturday, January 26, 2013 while the party gathers to vote for a new provincial Leader and in turn a new premier of Ontario.

  • Supporters of Sandra Pupatello look on as Kathleen Wynne gains momentum at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • A look at the size of the <a href="http://www.huffingtonpost.ca/2013/01/26/ontario-liberal-convention-protest_n_2556296.html?utm_hp_ref=canada-politics">protest outside the Ontario Liberal Convention</a> in Toronto on Jan. 26, 2013.

  • Sandra Pupatello, left, gets endorsed by Harinder Takhar, right, at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Ontario Liberal Party leadership candidate Sandra Putatello celebrates with former prime minister John Turner at the convention in Toronto on Saturday January 26, 2013.

  • Ontario Liberal Party leadership candidate Kathleen Wynne speaks at the convention in Toronto on Saturday January 26, 2013.

  • Ontario Liberal Party leadership candidate Kathleen Wynne waves with fellow candidate Eric Hoskins (right) and his wife Samantha Nutt (front left) after he arrived to give her his support after the first ballot at the convention in Toronto on Saturday January 26, 2013.

  • Ontario Liberal Party leadership candidate Sandra Putatello celebrates with fellow candidate Harinder Takhar after he gave her his support at the convention in Toronto on Saturday January 26, 2013.

  • Ontario Liberal Party leadership candidate Sandra Putatello speaks at the convention in Toronto on Saturday January 26, 2013.

  • Kathleen Wynne dances on stage at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Ontario Liberal Party leadership convention delegates are greeted by hundreds of protesters as they arrive at convention in Toronto on Saturday January 26, 2013.

  • Gerard Kennedy waves on stage at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Harinder Takhar waves on stage at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Charles Sousa waves to supporters while on stage at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Eric Hoskins waves to supporters on stage at the Ontario Liberal Leadership convention in Toronto on Saturday, January 26, 2013.

  • Outgoing Premier Dalton McGuinty waves from the stage with his family after speaking at the Ontario Liberal Leadership convention in Toronto on Friday, January 25, 2013.

  • Outgoing Premier Dalton McGuinty speaks at the Ontario Liberal Leadership convention in Toronto on Friday, January 25, 2013.

  • Outgoing Premier Dalton McGuinty speaks at the Ontario Liberal Leadership convention in Toronto on Friday, January 25, 2013.

  • Premier Dalton McGuinty and his wife Terri McGuinty take their seats at the Ontario Liberal Leadership convention in Toronto on Friday, January 25, 2013.

  • Interim federal Liberal Leader Bob Rae greets Premier Dalton McGuinty at the Ontario Liberal Leadership convention in Toronto on Friday, January 25, 2013.

  • Ontario Liberal Party leadership candidate Sandra Pupatello departs after voting at the convention in Toronto on Friday January 25, 2013.

  • Ontario Liberal Party leadership candidate Kathleen Wynne talks with a delegate as she registers to vote at the leadership convention in Toronto on Friday, January 25, 2013.

  • Ontario Liberal Party leadership candidate Gerard Kennedy talks on his phone at the leadership convention in Toronto on Friday, January 25, 2013.

  • A cameraman is silhouetted against a projection screen at the Ontario Liberal Leadership convention in Toronto on Friday, January 25, 2013.

  • Ontario Liberal Party leadership candidate Charles Sousa and his wife Zenaida arrive to vote at the leadership convention in Toronto on Friday, January 25, 2013.

  • Ontario Liberal Party leadership candidate supporters hang banners at the site of the convention in Toronto on Thursday January 24, 2013.