……was right not to hang with any of the co-stars.

Topher Grace's Real-Life Relationship With The That '70s Show Cast Wasn't So Rosy (https://www.nickiswift.com/2185889/why-that-70s-show-cast-wasnt-friends-with-topher-grace-real-life/)

Topher Grace's character might've been the primary focus on "That '70s Show," but he didn't really get along with his fellow cast members — except for one.