Rumours of a possible divorce hit the press earlier this year after Banderas was apparently snapped with a mystery woman in Cancun, and also seen dancing with Mallika Sherawat at the Cannes Film Festival.
Griffith was also seen in public in recent days not wearing her wedding ring, which only fuelled suggestions of marital troubles.
A friend of the family has now clarified to People that Banderas and Griffith actually seem more in love than ever.
"They seem absolutely fine. Honestly, they seem happy," the insider told People.
Another source added that the couple have not been seen publicly together in recent weeks simply because Banderas is shooting a movie away from LA.
Banderas and Griffth met on the set of the film Two Much and married in May 1996. They are parents to 15-year-old daughter Stella del Carmen Banderas Griffith.
Watch a trailer for Two Much below: