John Stamos

A couple were found guilty of attempting to extort $680,000 from John Stamos  with purported photos of him with strippers and cocaine.

Lawyer denies John Stamos had a fling with 17-year-old as extortion trial starts

Allison Coss, 24, and Scott Sippola, 31, both of Marquette, Mich., were convicted Thursday of conspiracy and using e-mail to threaten a person's reputation, according to The Associated Press.

"I would like to thank the court, the FBI and the U.S. attorney's office for their swift and efficient dealings in connection with this case," the former ER and Full House star said. "I am shocked and perplexed how individuals could fabricate so many false stories in an effort to defend a crime."

John Stamos target of extortion attempt, rep says

The presiding judge ruled that testimony about whether Stamos had an intimate relationship with Coss would not be allowed during the case. "The allegations made regarding an inappropriate relationship are completely untrue," Stamos, 46, continued. "These slanderous allegations to smear my reputation were part of their defense to redirect attention away from the federal crime of extortion. 

"There was no hot tub, no drugs, no nudity and nothing sexual in nature involved in my friendship with this woman. They lied about everything from a pregnancy to compromising photos."

Coss and Sippola were arrested in November after the FBI set up a sting operation at a money drop.

The AP reported that dozens of fans waited outside the federal courthouse after the verdict to congratulate Stamos.