You thought you’d never live to see a movie with the credit “Written and directed by Jennifer Jason Leigh and Alan Cumming.” Now you can die happy. Their sad, sly little film, in which they also co-star as a Hollywood couple navigating a potentially fatal passage in their marriage, is called The Anniversary Party. Shot on digital video, it takes place over the course of 24 or so hours as the couple’s friends gather for the titular celebration. Think Neutra house, power charades, too much champagne followed by a round of ecstasy. The searing revelations that come as night wears into morning seem more obligatory than illuminating. (Something has to happen in the third act.) But in its sunnier, less Eugene O’Neill-inspired moments the film pokes fun at haute Los Angeles—where life seems to be a soufflé made of ego, anxiety, and soy milk—with a wry, knowing understatement the subject hasn’t seen since the likes of Shampoo or Bob & Carol & Ted & Alice. One pleasure is the way many of the actors have been cast in mordantly self-referential roles—Kevin Kline, for instance, as a vainglorious, Shakespeare-quoting, Oscar-winning movie star. Gwyneth Paltrow' almost steals the film as a lovely airhead ingenue with seemingly more industry clout than the other characters combined. That these portraits embrace cattiness while skirting caricature is testament to the talent of all concerned. (Rating: ★★★½)