Melanie Griffith and Antonio Banderas have reportedly had marital "issues for a long time".
The Hollywood couple announced at the weekend that they were divorcing after 18 years of marriage, but it is believed their romance has been on the rocks for a while.
A source told the New York Post's Page Six column: "Melanie and Antonio have had issues for a long time. They used to be so affectionate with each other, but more recently they've been drifting apart."
Griffith, 56 - who has son Alexander, 29, and daughter Dakota, 24, from previous relationships - reportedly agreed to work at her marriage with Banderas, 53, for the sake of their 17-year-old daughter Stella.
Another source explained: "There's been an arrangement in their marriage for some time to stay together despite their problems, because of the children and his Catholic religious beliefs. They have worked hard to keep this split as amicable as possible."
The Working Girl star filed for divorce citing irreconcilable differences as the reason behind their split. She is asking for child support and sole physical and joint legal custody of Stella, as well as spousal support. Griffith has three previous divorces, including actor Don Johnson while it is the second divorce for Banderas.