AceShowbiz - A Michigan couple convicted of attempting to extort $680,000 from actor John Stamos' has been sentenced to four years in prison. Allison Coss and Scott Sippola were arrested in December 2009 after they allegedly threatened to release snaps of the actor with cocaine and strippers unless he handed over the money.

Coss claimed she met the actor when she was 17 before embarking on a romantic affair. Stamos denied the allegations but admitted to meeting Coss at a 2004 party in Orlando, Florida, shortly after separating from his wife, Rebecca Romijn.

Officials at the Federal Bureau of Investigation (FBI) have confirmed the photos in question did not exist. In July this year, Coss, 24, and Sippola, 31, were found guilty of conspiracy and using emails to threaten a person's reputation. U.S. District Judge R. Allan Edgar sentenced Coss and Sippola to serve four years in prison each at a hearing on Friday, October 8.

In a court document filed this week, Sippola apologized for his actions, stating, "I sought to exploit my knowledge of the personal weaknesses of a perfect stranger for my own undeserved financial gain. I would be angry and hurt if that had happened to me and I am certain that Mr. Stamos feels that way towards me." Stamos was not in court for the sentencing.