The world-famous model and actress died from carbon monoxide poisoning.

The Canadian model and actress Dayle Haddon, who appeared in many films, passed away at the age of 76.

The police in Solebury, Pennsylvania, stated that they suspect Haddon’s daughter Ryan Haddon and son-in-law, actor Marc Blucas from the series "Buffy the Vampire Slayer," were involved in a carbon monoxide poisoning incident at their home in Bucks County.

Authorities said in a statement, "The investigation shows that a faulty chimney and exhaust pipe in the gas heating system caused the carbon monoxide leak. This tragic event reminds us of the importance of carbon monoxide safety measures in our homes."

The police received a tip-off from one of the residents early Friday morning. Upon arrival, they found Haddon dead on the second floor of the building, while 76-year-old Walter Blucas was found unconscious on the first floor. Blucas was taken to Robert Wood Johnson University Hospital in New Jersey, and his condition is critical.

Her daughter Ryan Haddon commemorated her mother on Instagram Friday night with the words: "Dayle's bright light has gone out in this world. I have no doubt she is shining as she always did, where it is needed most. She was a strong yet gentle woman, caring to everyone. She was filled with beauty inside and out, deeply creative and curious."

Born in Montreal in 1948, Dayle Haddon joined Les Grands Ballets Canadiens at the age of 13 and was crowned Miss Montreal at 18. She had a successful modeling career in the 1970s and 80s, appearing on the cover of Sports Illustrated's 1973 Swimsuit Issue and in magazines like Vogue and Elle. Most recently, she was featured in photos taken by Baz Luhrmann for Vogue's September issue alongside Blake Lively.

Haddon appeared in films such as "The World's Greatest Athlete," "Madame Claude," "North Dallas Forty," and "Cyborg," and had small roles in two Woody Allen films in the 1990s. She became the face of brands like L'Oréal, Estée Lauder, Max Factor, and Revlon, achieving success particularly in promoting anti-aging products for women over 35.

Haddon also founded a charity called WomenOne to support women's education worldwide, became a UNICEF Ambassador in 2008, and collaborated with Free the Children to support the education of girls in Kenya.