The West Ham striker will line up against Pearce's Manchester City side at Eastlands as they battle it out for a place in the semi-finals.
"I was mostly in the reserves and youth team and he was first-team skipper (at Forest), but I know Stuart really well and it will be good to see him again," said Harewood.
"He'll probably keep tabs on me and tell me off or tell me to go and do something, he is like that!"