After a drunken one-night stand with an ambitious television personality, an unemployed, aimless stoner learns he is about to become a father. What begins as an awkward mistake gradually forces the mismatched pair to test whether affection and responsibility can grow from such unlikely soil. Judd Apatow blends raunchy improvisation with genuine emotional stakes, letting Seth Rogen and Katherine Heigl fumble toward maturity in real time. Crude yet surprisingly heartfelt, it captures the panic of arrested adolescence colliding with impending adulthood, and helped define a warmer, more human strain of the modern American comedy.