The Truth About Katherine Heigl And Seth Rogen's 'Knocked Up' Feud

Seth Rogen is finally clearing the air regarding his longtime feud with “Knocked Up” co-star Katherine Heigl.

During a recent guest appearance on “Watch What Happens Live,” the 34-year-old “Neighbors" star was asked about his beef with Heigl, 37, and whether or not he’s willing to work with her again.