Little (2019)

Jordan is a take-no-prisoners tech mogul who torments her long-suffering assistant, April, and the rest of her employees on a daily basis. She soon faces an unexpected threat to her personal life and career when she magically transforms into a 13-year-old version of herself right before a do-or-die presentation. Jordan will now need to rely on April more than ever -- if April is willing to stop treating Jordan like a 13-year-old child who has an attitude problem.