Kelly Hayden listen


Kelly* is as tenacious as her English bulldog is stubborn. This quality serves her clients well, who she represents in a broad range of litigation areas, including professional liability, administrative law, commercial litigation, and the creative industries. Kelly has§ prior experience as a researcher for the School of International Relations at the University of Southern California, which she relies on in her practice to investigate facts and drill down on key issues. Passionate about advocacy, Kelly gets the edge on her competition through creative thinking and results-driven problem solving. With a confident attitude and a modern perspective, Kelly inspires trust from judges, clients and colleagues alike. A previous competitor for Queen’s University, Kelly now serves on the Gale Cup Moot Committee. .



Kelly Hayden

is a lawyer at Lenczner Slaght.

Kelly’s practice encompasses a broad range of litigation areas, including professional liability and regulation, public and administrative law, class actions, real property and commercial litigation. She has appeared before the Court of Appeal of Ontario, the Superior Court of Justice and a number of statutory tribunals.

A previous competitor for Queen’s, Kelly now serves on the Gale Cup Moot Committee as well as the firm’s Diversity and Inclusion Committee. Kelly has also led seminars in medical ethics for the University of Toronto Faculty of Medicine.

Prior to joining the firm, Kelly worked as a researcher for the School of International Relations at the University of Southern California. While at law school, Kelly was President of the Queen’s chapter of OutLaw, represented inmates as part of the Prison Law Program and sat on the Executive of the Sexual Health Resource Centre.

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  • The Advocates' Society

  • Canadian Bar Association

  • Ontario Bar Association

  • Save It for Certification: The Court’s Answer to the Question of Which Jurisdiction Wore it Better

    Two proposed class actions. Two law firms. Two provinces. One set of facts. Which action will reign supreme? In DALI 675 Pension Fund v SNC Lavalin, the class actions version of “who wore it better”, Justice Belobaba addressed the question of whether a parallel class action proceeding commenced in a separate province constitutes an abuse of process. His answer? Just a healthy dose of competition.

    Kelly Hayden | January 10, 2020

  • Supreme Court of Canada to weigh in on waiver of tort

    One of the seemingly foundational principles of tort law is that the plaintiff must prove they have suffered loss in order to establish a defendant’s liability. Plaintiffs are entitled to be compensated for the loss they have suffered, and only for the loss they have suffered—or so we thought. In Atlantic Lottery v Babstock, the Newfoundland and Labrador Court of Appeal capped off a developing line of authority in the class actions context that recognizes the possibility of an independent cause of action in “waiver of tort”.  Under this doctrine, claimants would be able to sue tortfeasors for disgorgement of profits gained through wrongdoing, without demonstrating that they themselves have suffered loss from such wrongdoing. This bold decision has attracted the attention of the Supreme Court of Canada, which in May 2019 granted leave to appeal to the defendant Lottery Corporation. Now all that’s left to do is to place your bets.

    Kelly Hayden | June 11, 2019

  • Darnley v Thompson

    Ontario Superior Court of Justice dismisses all allegations against the Mayor of Caledon in an application brought pursuant to the Municipal Conflict of Interest Act.

    Alan J. Lenczner, Andrew Parley & Kelly Hayden | December 13, 2016

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