Dayle Haddon, a supermodel, actress and humanitarian, died of carbon monoxide poisoning in Bucks County, Pennsylvania.

The 76-year-old Canadian-born icon was found dead Friday morning in a detached “in-law” suite on the property of her daughter Ryan Haddon and son-in-law, actor Marc Blucas.

What happened to Dayle Haddon?

Police were called to the 6900 block of Phillips Mill Road around 6:30 a.m. Friday after a resident reported an unconscious man on the first floor of the suite. The man, also 76, was flown to Robert Wood Johnson University Hospital in New Brunswick, New Jersey.

Haddon was found in a second floor bedroom and was pronounced dead at the scene.

Who was Dayle Haddon?

Dayle Haddon rose to fame as a Sports Illustrated model in the 1970s. She transitioned into acting, starring opposite Nick Nolte in Disney’s “The Greatest Athlete in the World” and the soccer satire “North Dallas Forty.”

Haddon later became a global ambassador for L’Oréal and wrote Ageless Beauty: A Woman’s Guide to Lifelong Beauty and Well-Being. Her humanitarian efforts included serving as a UNICEF ambassador and founding WomenOne, a nonprofit organization dedicated to improving educational opportunities for girls and women.

The Solebury Township property is owned by Ryan Haddon, a former journalist, and her husband Marc Blucas, known for his roles in “Buffy the Vampire Slayer,” “Blue Bloods” and the film “First Daughter.”

Ryan Haddon was married to actor Christian Slater before her wedding to Blucas in 2009.

Where is Solebury Township?

Solebury Township is a picturesque and affluent community in Bucks County, Pennsylvania, just outside of Philadelphia.

Covering nearly 27 square miles, it’s just a short drive from New Hope, a vibrant riverside city known for arts, dining and cultural attractions.

The community and surrounding areas in Bucks County have become home to several celebrities and notable figures. Pop star Pink and actress and singer Sabrina Carpenter hail from the nearby Doylestown area. Gigi Hadid and Bradley Cooper also live in nearby New Hope.

What is carbon monoxide poisoning?

Carbon monoxide poisoning occurs when someone breathes in too much carbon monoxide (CO), a deadly gas that cannot be seen, smelled or tasted. The cause of this is often defective devices such as ovens or gas stoves or the operation of engines in closed rooms.

Even small amounts of CO can cause dizziness, nausea or confusion, while high amounts can quickly lead to unconsciousness or death. Because it is impossible to detect without a CO detector, it is called the “silent killer.”

This article originally appeared on Bucks County Courier Times: Dayle Haddon dies in Bucks CountyM; What is carbon monoxide poisoning?