COVID-19 Update — To assist in our community’s collective effort to combat COVID-19, our physical offices are operating on a restricted basis. Although we are limiting attendance at our office by both firm members and clients, we remain otherwise fully operational and look forward to continuing to provide the highest level of legal services to our clients. Read our full response notice here.

Justin Irwin joined Mills & Mills LLP in 2021 as an Associate in the Wills and Estates Group. Justin is experienced with preparing wills and powers of attorney, and in assisting clients to administer estates from beginning to end.

Justin received his JD from the University of Toronto in 2019, where he worked as a research assistant and was a senior editor of the Law Review. He articled with a small Toronto law firm before being called to the Bar in 2020. Justin has specialized in estate planning and estate administration since graduating from law school, and is committed to working with clients to manage their loved one’s estates in an efficient and cost effective manner.

Before attending law school, Justin completed a PhD in History at McGill University. As a graduate student he was active in researching and teaching, and served three terms as president of AGSEM, a union that represents teaching assistants and exam invigilators at McGill. Justin continues to have an interest in history as a member of the Osgoode Society for Legal History.

Year of Call



B.A., Queen’s University, 2008
M.A., Queen’s University, 2009
Ph.D., McGill University, 2016
J.D., University of Toronto, 2019


Law Society of Ontario
Osgoode Society

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