Former "Saved by the Bell" actor Dustin Diamond has been booked into jail to start his four-month sentence for an altercation at a Wisconsin bar.

The Ozaukee County Jail website shows Diamond was booked Friday.

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Diamond played Screech on the 1990s TV show. He was convicted in June of carrying a concealed weapon and disorderly conduct, both misdemeanors. He was cleared of a felony. He was to start jail during the summer, but a judge put the sentence on hold while Diamond appealed. Diamond withdrew his appeal last month.

Diamond testified he was trying to protect his girlfriend when he pulled out a pocketknife to ward people off and accidentally stabbed a man at the Port Washington bar on Christmas in 2014.

Port Washington is 25 miles north of Milwaukee.