"Saved by the Bell" alum Dustin Diamond began his four-month sentence on Friday after being convicted last year for stabbing a man during a bar fight on Christmas 2014.

Diamond, a standup comedian best known for playing Samuel "Screech" Powers on the popular '90s sitcom, was booked into the Ozaukee County jail in Wisconsin to serve his jail sentence, reports ABC News. His sentence includes work release.

Last June, the famed actor was found his guilty of two misdemeanor counts after a three-day trial. He was then order to start jail during the summer, but a judge put the sentence on hold while Diamond's legal team filed an appeal against his conviction. They withdrew the appeal last month.

The stabbing incident occurred when the 39-year-old actor used a switchblade to stab a 25-year-old man during a fight at the Grand Avenue Saloon in Port Washington on Dec. 25, 2014. Court documents show the victim suffered from a non-life-threatening, half-inch wound under his armpit and heavy bleeding.

Diamond was convicted in May 2015 by an Ozaukee County jury of carrying a concealed weapon and disorderly conduct. However, he was cleared of a felony charge of recklessly endangering public safety.

During the trial, Diamond testified his fiancée, Amanda Schutz, was involved in an incident with a small group and that he was just trying to protect her.

In a criminal complaint, Diamond and Schutz also stated that they got into a physical altercation with two men and a woman. Diamond also told police he accidentally stabbed one of the men while he was trying to defend his fiancée.

Schutz was found guilty of one misdemeanor count of disorderly conduct and ordered to pay a $500 fine for her involvement in the incident.

In September, Diamond appeared in court for a restitution hearing where he was ordered to pay over $1,000 in fines," reported Fox 6 Now.

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