Dayle was born and raised in Toronto, Canada. As a child she was enrolled in dancing classes to develop her physique. It worked well enough that she became a member of Les Grands Ballets Canadiens at 13 and Miss Montreal at 18.Her elfin good looks provided an easy entree to modeling and she quickly became a highly successful fashion model. She moved to Hollywood in her early twenties to be with a boyfriend and decided to try out for movies. She quickly landed a role in a Disney movie The World's Greatest Athlete (1973). Disney saw her a future for her in ingenue roles, but Dayle had other ideas. To Disney's shock, she promptly did a nude pictorial in '"Playboy" (USA)', took off for Europe and landed a string of steamy roles. Her best known role is in Just Jaeckin's Madame Claude (1977). She has worked primarily in Europe, cropping up occasionally in small roles in American movies.