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.Dayle's husband died suddenly in 1991, leaving her with little money and a fifteen-year-old daughter to raise alone. Not being able to afford any longer to live in her house, she had to rent it out and move into a small maid's room off a friend's kitchen. She also had to find work right away. Doors slammed in her face because of her age in her previous professions of modeling, dancing, and acting. Dayle still had a daughter to support, so she had to take whatever she could get. Eventually, she managed to secure a menial position in a small advertising agency through a friend of a friend. Her nadir came the day she discovered a coyote, in a car commercial the agency was filming, earned more money than she did. It was time to move on. She hit the library to research the statistics about women of her generation, the baby boomers, and identified their growing importance in the health and beauty market. She knocked on the doors of the major cosmetics companies to tell them they were missing an opportunity. She weathered many rejections, but got her breakthrough when Clairol selected her as a spokesperson. She was then chosen to be the face of a new anti-aging line for 'Estee Lauder'. On the day that the Lauder contract expired, L'Oreal signed her. She now has her own company, Dayle Haddon Concepts Inc, and travels the world as a spokesperson for L'Oreal to inspire and offer practical solutions in the areas of spirit, wisdom, beauty, and wellness for women.