Speaking to E! at Friday's Don’t Forget Haiti benefit, the Medium star noted that she and Jane are both doing well in the wake of their divorce filing.
"We're both really good," she said.
Arquette also stated that people would be surprised as to how well she and Jane still get along.
The actress added: "I don't think people would even imagine that it could be so friendly and not weird."
The couple split in August after four years of marriage. They have one daughter.