Braff, 36, is best known for his work on the TV sitcom "Scrubs," and in the films "Garden State" and "The Last Kiss."
An announcement purportedly posted by the actor said he is "excited and proud that that I am an open member of the homosexual community."
However, Braff's publicist told E! News Wednesday the statement is a hoax.
"He was hacked. The Web site has not been used since 2006," the representative told E! News. "He is still straight."
NBC reportedly holds celebs hostage to Jimmy Fallon's show
Aaron Carter is still in love with Hilary Duff