The duo met on the set of "Underworld". Beckinsale has has since appeared in several of his films, including the new "Total Recall" remake.
The 39-year-old actress said that it is strange when she has to let him take control as it is a different scene when they are at home, reported Contactmusic.
"Normally he's taking direction from me because he never knows where anything is in the house. He can't remember if he likes parsnips, so I'm usually in charge of going, 'No babe, you don't actually like parsnips; you say they taste like perfume'," Beckinsale said.
"It is a slight gear change at home but I met him that way so it's not terribly shocking," she added.