Arlette Marie-Laure Lefebvre,, known by her patients as "Dr. Froggie" (born 26 July 1947) is a child psychiatrist at the Hospital for Sick Children in Toronto, Ontario, Canada.
Born in Montreal, Quebec, she received a Bachelor of Arts degree in 1964 from the Université de Caen and a Doctor of Medicine degree in 1970 from the University of Toronto. Lefebvre is also an associate professor at the University of Toronto.
She is a member of both the Order of Ontario and the Order of Canada. In 1991, she founded Ability Online. In 1996, she was inducted into the Terry Fox Hall of Fame.