Nardelli will portray a preppy misfit named Trey, reports TVLine.
On the show's second season, Trey befriends Jack Porter's (Nick Wechsler) younger brother Declan Porter (Connor Paolo) only to get him in trouble.
Nardelli's acting credits include The Client List, CSI: NY and My Name Is Earl.
Revenge follows Emily Thorne (Emily VanCamp) as she seeks to get vengeance on those who framed her father.
VanCamp recently shared her excitement to work with Jennifer Jason Leigh on the second season.
She said: "It is not about getting the most famous person - it is just about finding someone incredible. We need that with this show. I couldn't be happier."
The series will return on Sunday, September 30 at 9pm ET on ABC.
Watch a promo of Revenge below (US only):