In lesser hands, Knocked Up could have devolved into a clichéd odd-couple farce. But with Apatow at the helm it becomes a genuine, realistic depiction of how two very different people learn to be a couple for the sake of their unborn child. Sure, there are hilariously graphic sex scenes ("The baby just kicked me, he's angry") and countless pot gags (you may get a contact high just watching those guys), but there's also an underlying message about truly facing adulthood.
As Alison's sister and brother-in-law, Leslie Mann and Paul Rudd (also Apatow regulars, and, in Mann's case, his wife) are terrifically matched as a hip couple with kids who are facing their own Oprah-fied brand of marriage problems. Their domestic banter -- "Wanna have sex?"/"Ugggh. I'm awful. I'm constipated. You really want to?" -- is funny, as they say, because it's true. If the idea of ubiquitous foul language (particularly "f--k"), sex talk, and marijuana references -- not to mention a, let's say, documentary-style portrayal of childbirth -- isn't your cup of tea, Knocked Up may not be a wise choice. But if you can enjoy (or at least see past) the raunch, you'll be richly rewarded with a tender homage to growing up, falling in love, and becoming a parent -- just not necessarily in that order.