In Life as We Know It, Katherine Heigl and Josh Duhamel flirt and square off as their characters are forced to raise a baby together when their mutual friends pass away. It's easy to see where their characters are headed in this romantic comedy, and Duhamel and Heigl seem to have onscreen chemistry to spare. Need proof? Watch this cute exclusive clip where Eric (Duhamel) tries to contain his jealousy when Holly (Heigl) heads out for a date with someone else. Life as We Know It hits theaters on Oct. 8.