Nick Lachey and Vanessa Minnillo were arm in arm for a movie date in LA yesterday. They watched The Dark Knight Rises in IMAX and Vanessa snacked on peanut M&M's during the show. Nick and Vanessa have been prepping for the arrival of their first child, with Nick installing the baby's car seat a few weeks ago. Nick's also wrapping up work after reuniting with 98 Degrees for a performance on the Today show and a concert at the MixTape Music Festival last month. The band has plans to record new music, though Nick will first take time off to enjoy fatherhood after Vanessa gives birth.