Mary-Kate & Ashley star as twins Chloe and Riley Carlson in this hilarious new series, based on the hit TV show, SO LITTLE TIME. Checklist: 1) Get detention on purpose. 2) Help the shy girl with a makeover. 3) Throw the coolest beach party ever. 4) Meet the boy of your dreams. Chloe and Riley Carlson… So much to do… SO LITTLE TIME! By Megan Stine. Based on the teleplay by Marcy Vosburgh.