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
Brian Mulroney host of CTV morning show "Your Morning", while Mark and Nicolas both work in financial industry in Toronto. Mulroney is the grandfather of Lewis H. Lapham III, and twins Pierce Lapham and Elizabeth Theodora Lapham, and Miranda Brooke Lapham from daughter, Caroline; and twins Brian Gerald Alexander and John Benedict Dimitri and daughter Isabel Veronica (known as Ivy) by son Ben and his wife Jessica. The twins served as page boys and train bearers at the wedding of Meghan Markle with Prince Harry, Duke of Sussex on 19 May 2018, which their parents also attended, and their sister was one