Seamus Thomas Harris O'Regan is a Canadian politician who has been the federal minister of labour since October 26, 2021, and minister of seniors since July 26, 2023. A member of the Liberal Party, O'Regan was elected to the House of Commons in 2015, representing St. John's South—Mount Pearl. He has been in Cabinet since 2017, previously serving as minister of natural resources from 2019 to 2021, minister of Indigenous services in 2019, and minister of veterans affairs and associate minister of national defence from 2017 to 2019. Before he entered politics, O'Regan was a correspondent with CTV National News, and a host of Canada AM, which he co-hosted from 2003 to 2011 with Beverly Thomson.

The Cabinet of Canada is a body of ministers of the Crown that, along with the Canadian monarch, and within the tenets of the Westminster system, forms the government of Canada. Chaired by the prime minister, the Cabinet is a committee of the King's Privy Council for Canada and the senior echelon of the Ministry, the membership of the Cabinet and Ministry often being co-terminal; as of November 2015 there were no members of the latter who were not also members of the former.