Mel Gibson & Wife Robyn Gibson — Officially Divorced

Mel Gibson and Robyn Gibson are officially single — a judge signed the divorce decree moments ago.

The only big change — Robyn is going back to her maiden name … so from now on it”s Robyn Moore.

As we reported, the couple”s been negotiating a financial settlement for over a year … and we”re told, it”s finally a done deal. There is no prenup.

The couple”s reported net worth is in the $900 million range — but sources tell us, it”s actually less.

Mel was represented by Larry Ginsberg.

Robyn — who was repped by disso-queen Laura Wasser — filed for divorce in 2009 following a three-year separation — shortly after learning Mel”s then GF Oksana Grigorieva was pregnant