The actor took to his Twitter account today to break the news to his fans.
The Inception star tweeted: "My super hero brother @burningdan 1974-2010."
Dan was a fire-spinner and flow arts teacher at Flow Temple Arts School in Venice Beach, CA.
Joseph also posted the following on his brother's website hitRECord: "BURNING dAN brightly embodied that bold beastly bliss sometimes referred to as 'the creative spirit'."
He added: "He was my chief collaborator on the foundational incarnations of hitRECord.org over the years and continues to inspire us ever the more."
The cause of Dan's death has not been released.