Oksana Grigorieva Arrives for Custody Hearing

Mel Gibson and Oksana Grigorieva have been leading separate lives in Los Angeles since their ugly split. (X17Online.com)

Mel Gibson's ex-girlfriend Oksana Grigorieva is in a Los Angeles courtroom for a custody hearing over the former couple's infant daughter.

The 40-year-old arrived for a hearing Wednesday morning flanked by deputies.

Gibson has not been seen at the hearing.

It is the first time that either Gibson or the Russian singer have appeared in a custody case that by law is closed to the public. A summary posted outside the courtroom indicated that attorneys would argue a motion to seize the passport of the former couple's 9-month-old daughter.

Although the couple reached a confidential custody agreement months ago, attorneys for both sides have held repeated hearings in a case that was later launched. The attorneys have declined to comment on the case.