Caroline Mulroney 12 years until 2005 when she returned to Canada, worked in financial services and became involved in charitable work. She also served on the board of directors of the Windsor–Detroit Bridge Authority. Mulroney is the only daughter and eldest child of the 18th Prime Minister of Canada, Brian Mulroney, and his wife Mila Mulroney. She is also a naturalized citizen of the United States. Mulroney is the eldest of four children and only daughter of former Prime Minister of Canada Brian Mulroney and his wife, Mila. One of her younger brothers is CTV morning host Ben Mulroney. Her father won
Caroline Mulroney after Bouchard defected from her father's party to the Bloc Québécois. In 1990, she helped canvass for Ontario PC candidate Alex Burney in the 1990 Ontario election. Mulroney came to prominence in 1991, during her father's tenure as prime minister, when "Frank" magazine ran a satirical advertisement for a contest inviting young Tories to "Deflower Caroline Mulroney". Mulroney's father was incensed and threatened physical harm toward those responsible before joining several women's groups in denouncing the ad as an incitement to rape. Mulroney supported her father during the Oliphant hearings where he admitted to taking $225,000 in cash from Karlheinz