We've Always Been Jealous of Katherine Heigl's Onscreen Loves

After party animal Ben Stone (Seth Rogen) gets straitlaced Alison Scott (Heigl) knocked up after a one-night stand, the two decide to face the whole baby thing together, and sheer hilarity ensues. There's few people more adorable than Rogen in Knocked Up (especially after he finally reads the baby books).