"I would love to. I keep trying to convince her,” Stone replied. "I have so many ideas."
Lawrence then revealed that the pair have been planning something, but it's under wraps for now.
"There is one idea that's floating around, but it's a secret," the Mother! star shared, with Stone adding, "Yeah, it's a secret idea."
When Lawrence asked if she forgot about the plan, Stone insisted, "No, I was just trying to be a good secret-keeper."