The 41-year-old 'Charlie's Angels' star said the duo, who recently announced their separation, worked hard to save their relationship, reported Contactmusic.
"For both Chris and Gwyneth, I mean they worked really hard. They've made a conscious effort to separate the part of their lives they don't want to live together anymore. They've done something really extraordinary, and they've been very brave at presenting that to the public," she said.
Diaz said the former couple are doing good now and insisted they are still friends.