Anna Cathcart would be a typical high school student, if not for the fact that she stars in a hit rom-com hailed by Netflix as one of its “most viewed original films ever.” In To All The Boys I’ve Loved Before and its sequel, To All The Boys I’ve Loved Before: P.S. I Still Love You (out February 12), the 16-year-old plays Kitty Covey, a precocious kid sister who inserts herself into Lara Jean Covey’s love life.