Gabriel Marie "Gai" Waterhouse (née Smith; born 2 September 1954) is an Australian horse trainer and businesswoman. The daughter of Tommy J. Smith, a leading trainer of Thoroughbred racehorses, Waterhouse was born and raised in Sydney. After graduating from the University of New South Wales, she worked as an actor for a time, appearing in both Australian and English television series. Having worked under her father for a period of 15 years, Waterhouse was granted an Australian Jockey Club (AJC) licence in 1992, and trained her first Group One (G1) winner later that year. In 1994, after her father became ill, she took over his Tulloch Lodge stable, and she has since trained 145 G1 winners and won seven Sydney trainers' premierships. She was also the trainer of Fiorente, the winner of the 2013 Melbourne Cup, becoming the third woman (and first Australian woman) to train a winner of that race. Waterhouse was inducted into the Australian Racing Hall of Fame in 2007, and has been described as the "first lady of Australian racing". Background and early career Waterhouse is the daughter of Valerie and Tommy J. Smith , a leading trainer of thoroughbred racehorses, who was based in Sydney. She was educated at the Convent of the Sacred Heart, Rose Bay (now Kincoppal-Rose Bay) in Sydney, and completed a Bachelor of Arts at the University of New South Wales in 1975. Waterhouse made a name for herself as a model and actor, including in the Australian drama The Young Doctors before moving to England and appearing in the Doctor Who story The Invasion of Time. She then returned to Australia where she served an apprenticeship under her father for fifteen years before getting her own trainer's licence. Training career Waterhouse was granted her Australian Jockey Club (AJC) licence in January 1992, although this was made difficult as her husband, Robbie Waterhouse, was banned over his involvement in the Fine Cotton scandal. AJC rules at the time stipulated that the spouse of a banned person could not be licensed, although this was subsequently overturned. Her first winner was the horse Gifted Poet in March 1992, and her first Group One winner was Te Akau Nick in the Metropolitan Handicap in October that year. After her father, T. J. Smith became ill, he passed on the Tulloch Lodge stable to her in the 1994–95 season. Waterhouse first achieved fame in Australia