Johnny Manziel will tell it to the judge this morning -- he's set to be arraigned for misdemeanor assault in his domestic violence case ... and TMZ Sports will be livestreaming the entire thing.
The ex-NFL quarterback was booked Wednesday in Highland Park, Texas -- but was released on $1,500 bail.
Manziel was ordered to appear in person Thursday to enter his plea -- his lawyer has said he will plead not guilty. The hearing is expected to begin at 7 AM PT.
If convicted, Manziel faces up to 1 year in jail.