John Stamos Faces Courtroom Drama

John Stamos appeared in court today in a case against two people accused of trying to extort more than a half a million dollars from the TV star.  INSIDE EDITION has the details.

Courtroom drama for former Full House star, John Stamos!

The actor took the witness stand in Federal Court on Tuesday to testify against a pretty blonde woman and her boyfriend, who are accused of conspiring to extort 680,000 dollars from the star. The couple allegedly threatened to sell photos they say show Stamos partying with cocaine and strippers unless he paid up.

Prosecutors say no such photos exist.

In court, Stamos testified that he was "very heartbroken" over his split from his supermodel wife Rebecca Romijn, when he met Allison Coss at a Florida club in 2004.

He denied having any type of romantic relationship with Coss, who was 17 at the time, saying they were "just hanging out" and "socializing." 

On the stands Stamos admitted to exchanging "flirty" e-mails with Coss for years saying, "It was all very sweet.  I considered her a friend."

That friendship quickly came to an end last year when Coss and her boyfriend were arrested in a sting operation trying pick up a sack of cash from an FBI agent  posing as Mr. Stamos's representative.