The off-and-on boyfriend of actress Christina Applegate was found dead in his Hollywood apartment, according to a Thursday report in leading newspaper. , the 26-year-old skateboarder, was found dead by a neighbor in his Hollywood apartment on Tuesday.

Applegate and Grivas had a tumultuous relationship due to his continual battle with drugs and alcohol and they haven't been seeing each other recently.

Applegate paid respects to her former boyfriend and expressed her condolences to his family. “I am profoundly saddened,” she said, in a statement to E! News. “Lee was an incredible human being who was an extremely important and beautiful part of my life. He is missed beyond words. He touched so many and I feel much sadness for his mother, brother and all of his family and friends,” she said.

The Los Angeles Police Department has launched an investigation into the case of Grivas’ death. Autopsy and toxicology results are still awaited, but preliminary reports suggest that Grivas died from drug overdose.