The "Heroes" starlet is trying to get her co-star - and recent ex-boyfriend - Milo Ventimiglia kicked off the show, according to OK! magazine.
Still upset about their break-up, Panettiere reportedly wants nothing more to do with Milo, says a mutual friend.
"She refuses to be on the set at the same time as him," the insider says. "She is making it difficult for everyone involved."
Panettiere's rep denied the report.
Source: NY Daily News