Hours before the accident, Dunn posted a picture on Twitter, through his Tumblr blog, which showed drinking with friends.
An unidentified passenger also died in the accident. TMZ said Dunn was the driver of the vehicle and the speed could have been a factor.
News that the incident has caused the name of Dunn to become a trending topic on Twitter, and fans and celebrity friends Tweet in memory of the star. Many Twitter users are also using Twitter falling about the dangers of drunk driving - which links the photo Tumblr with fatal accident - although the exact circumstances that led to the crisis are still unknown.
Flickr user Eric Lewis published the picture below with a legend that says the photo shows what remains of Dunn's car.
Cryptic Dunn last photo is not the first of its kind. Last year, the famous plastic surgeon Frank Ryan died in a car accident, his final tweet was a picture of yourself and your dog. It was later discovered that Ryan was twittering while driving.