"She's a very good friend. I'm supporting her in all the ways that I can. I'm just there for her. I speak to her a lot," Paltrow told reporters, as she attended a premiere of her film "Two Lovers" at London's Film Festival.
Like Madonna, Paltrow -- who is married to Coldplay singer Chris Martin -- lives partly in London.
Madonna and Ritchie confirmed their separation last week, nearly eight years after their wedding in a Scottish castle in December 2000.
The couple have two children: Rocco, 8, and David Banda, 3, who was adopted in Malawi in 2006. Madonna also has a 12-year-old daughter, Lourdes, from a previous relationship.
Madonna's publicist said Sunday that details of a divorce settlement are yet to be finalized, dismissing reports that the couple had agreed to a custody arrangement for the couple's children.
The couple own homes in London, Los Angeles and New York, and a 1,200-acre retreat in Wiltshire, England.
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