The man behind beloved character Elmo became embroiled in a sex scandal last month (Nov12), when he was accused of having relations with a 16-year-old boy when he was 45.
The allegations were subsequently recanted, but another man, Cecil Singleton, came forward and sued Clash for $5 million (£3.1 million) over another alleged inappropriate incident he had with the then-15 year old in 1993, prompting Clash to quit the children's show.
A third man filed suit over claims of improper conduct and now another unidentified male is taking legal action too.
In papers filed in New York federal court, the latest accuser reveals he first met Clash as a teen in Miami Beach, Florida between 1995 and 1996, when the actor was in his mid-30s, and they embarked on a long-distance relationship.
The purported victim alleges Clash, now 52, once flew him to New York, where the pair had sex multiple times.
The unnamed man claims he suffered emotional, mental and psychological damage as a result of the improper romance, and his lawyer, Jeff Herman, tells Tmz.com, "According to our lawsuit, Kevin Clash knowingly paid to transport a minor across state lines for the purpose of satisfying his sexual interests."