Melanie Griffith, Antonio Banderas -- Divorce a Done Deal

Melanie Griffith and Antonio Banderas have taken the last step to end their marriage, by signing documents making their divorce official.

Court records show both signed the necessary legal docs to become officially single after 18 years of marriage.

Melanie was asking for full custody of their daughter, Stella, and also wanted spousal support. The custody issue resolved itself when Stella turned 18 last September.

A judge still needs to sign the docs to make everything official and that should happen in a matter of days.

It's her 4th divorce and his 2nd.