Imagine finding out that single-minded discipline in high school yielded no more success than that of the the cool kids who also partied all four years. That’s the premise of first time director Olivia Wilde’s Booksmart (B), one of those very sweet films wrapped in the package of a vulgar comedy, in which its central duo endeavors to make up for lost time with a free-spirited romp on graduation eve. This irreverent movie has plenty of great laughs and gags and is notable for its central friendship between a lesbian character (Kaitlyn Dever) and her loving but controlling straight best friend (Beanie Feldstein). Feldstein steals the show with her potent mix of feisty friendliness and devious directness (for those who don’t know, she’s Jonah Hill’s sister and equally super-badass). The film is largely a series of episodic moments through misbegotten parties with its ladies getting into maiden voyages of mischief, but the film’s characters are generally good-spirited and it never gets too dark. Jason Sudeikis, Jessica Williams, Will Forte and Lisa Kudrow are enjoyable in small roles. Wilde demonstrates command of the medium and brings a fresh female perspective to the notion that all hard work and no play is no fun for anyone.