New NDP Leader Tom Mulcair appointed his shadow cabinet to Stephen Harper's Conservative government on Thursday, naming three deputy leaders and assigning a number of former leadership rivals to prominent posts.

Nova Scotia MP Megan Leslie and Ontario MP Dave Christopherson will join Libby Davies as deputy leaders.

Davies, a veteran caucus member from Vancouver, served as one of Jack Layton's deputy leaders alongside Mulcair.

Mulcair announced after winning the leadership in March that Davies would continue to serve as his deputy leader.

Davies had supported Brian Topp during the NDP leadership race.

Christopherson, on the other hand, was a strong supporter of Mulcair throughout the race. Leslie had remained neutral in the run-up to the leadership convention.

BC MP Nathan Cullen, one of Mulcair's rivals for the leadership of the NDP, was appointed as Opposition House leader, and will be assisted by new deputy House leader Sadia Groguhé, the MP for Saint-Lambert in Quebec.

Nash, Dewar, return to former portfolios

Fellow leadership rivals Paul Dewar, Peggy Nash and Niki Ashton also returned to their former posts as critics of foreign affairs, finance and women's issues, respectively. Romeo Saganash will move to international development and Robert Chisholm moves to fisheries, in addition to helping on intergovernmental affairs.

Former interim leader Nycole Turmel was also named chief Opposition whip.

"I am proud of the quality of the team we have," said Mulcair in a statement. "I am particularly proud of the sense of unity and purpose New Democrat MPs have shown as we went through this process."

Some shuffling of critics' responsibilities was necessary during the leadership race as senior MPs ran leadership campaigns, spending long periods travelling and absent from House of Commons debates and question period. The party's rules dictated that leadership candidates had to step down from their critic roles.

Saganash, for example, was the natural resources critic, but gave up that post to run for the leadership and was replaced by Claude Gravelle in the interim. Peter Julian now takes over as the critic for energy and natural resources.

Here's a complete breakdown of the NDP's House officers and shadow cabinet:

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• Little-Known Mulcair Facts

  Here are some facts you may not have known about NDP Leader Thomas Mulcair. (CP)

• 10. He Used To Be A Liberal

  <a href="http://en.wikipedia.org/wiki/Thomas_Mulcair" target="_hplink">Mulcair was Minister of Sustainable Development, Environment and Parks</a> in Jean Charest's Liberal government in Quebec. He served in the role from 2003-2006. (CP)

• 8. He's French (Kind Of)

  Mulcair married Catherine Pinhas in 1976. She was born in France to a Turkish family of Sephardic Jewish descent. <a href="http://www.thestar.com/news/canada/politics/article/1158289--thomas-mulcair-s-wife-catherine-a-psychologist-and-political-confidante?bn=1" target="_hplink">Mulcair has French citizenship through his marriage</a>, as do the couple's two sons. (KENZO TRIBOUILLARD/AFP/Getty Images)

• 7. They Used To Be Friends

  <a href="http://en.wikipedia.org/wiki/Thomas_Mulcair" target="_hplink">Mulcair left Charest's Liberal government in Quebec </a>after he was offered the position of Minister of Government Services in 2006, an apparent demotion from Minister of the Environment. Mulcair has said his ouster was related to his opposition to a government plan to transfer land in the Mont Orford provincial park to condo developers. (CP)

• 6. Ancestor Was Premier Of Quebec

  Mulcair's great-great-grandfather on his mother's side was <a href="http://en.wikipedia.org/wiki/Honor%C3%A9_Mercier" target="_hplink">Honoré Mercier, the ninth premier of Quebec</a>. (Public Domain/Bibliothèque et Archives nationales du Québec)

• 5. First!

  <a href="http://en.wikipedia.org/wiki/Thomas_Mulcair" target="_hplink">Mulcair was the first New Democrat to win a riding in Quebec during a federal election</a>. He held the riding of Outremont during the 2008 election after first winning the seat in a 2007 by-election. Phil Edmonston was the first New Democrat to win a seat in Quebec, but his win came in a 1990 by-election. Robert Toupin was the very first to bring a Quebec seat to the NDP, but he did it in 1986 by crossing the floor. (Alamy)

• 4. He's Half Irish.

  <a href="http://en.wikipedia.org/wiki/Thomas_Mulcair" target="_hplink">Mulcair's father Harry Donnelly Mulcair was Irish-Canadian</a> and his mother Jeanne French-Canadian. His father spoke to him in English and his mother in French -- explaining his fluency in both official languages. (Photo by Spencer Platt/Getty Images)

• 3. He Votes In France

  Muclair has voted in past French elections, but says that now that he is leader of the Official Opposition <a href="http://www.thestar.com/news/canada/politics/article/1157191" target="_hplink">he will not take part in the upcoming French presidential vote</a>. (Thinkstock)

• 2. Young Love At First Sight

  <a href="http://www.thestar.com/news/canada/politics/article/1158289--thomas-mulcair-s-wife-catherine-a-psychologist-and-political-confidante?bn=1" target="_hplink">Mulcair met his future wife at a wedding when they were both teenagers</a>. Catherine was visiting from France. They married two years later when they were both 21. (CP)

• 1. Mr. Angry

  <a href="http://www2.macleans.ca/2012/03/16/thomas-mulcair-is-mr-angry/" target="_hplink">Mulcair was given the moniker in a Maclean's headline</a>, but the new leader of the NDP has long been known for his short fuse. In 2005, he was fined $95,000 for defamatory comments he made about former PQ minister Yves Duhaime on TV. The comments included French vulgarity and an accusation that alleged influence peddling would land Duhaime in prison.