Greta gives 'Booksmart' four out of four Gretas, a new rating system we've devised specifically for this wonderful new movie.  Why's it so good? Well, it’s smart, funny, a little raunchy, and it embraces so many gorgeous, gut-wrenching elements of what it means to be a smart, funny teenage girl. This week on Nerdette, we talk with the wonderful Kaitlyn Dever and Beanie Feldstein (the stars of the film) about the movie's themes: Friendship, growing older, sexuality, feminism, and dealing with high expectations. Bottom line: GO SEE IT.