Jon Cryer Custody Hearing -- Lips Sealed

5/10/2010 7:55 PM PDT BY TMZ STAFF
Jon Cryer has just left court in his bitter child support hearing with ex-wife Sarah Trigger.  And per the judge, everyone is mum.

Cryer was trying to reduce his child support payments from $8,000 a month to zero. 

Cryer's position -- he has primary custody of 9-year-old Charlie.

Trigger's lawyer would not comment on what happened in court.  All she said -- "We're relieved it's over."