I don't have specific details. But usually, Regina King's role could be significant and contribute to the plot in a meaningful way. It could be a supporting character who adds depth or a main character driving the story forward.
I have no exact information. But chances are she might have a complex and interesting role that influences the course of the Cinderella story in unexpected ways. Maybe she's a mentor, a friend, or a villain. Who knows?
I'm not sure. Maybe you'll have to watch the story to find out!