When your co-worker becomes your ex, on the next Oprah….

Barely legal sex symbol Hayden Panettiere wants her former boyfriend fired from the cast of NBC’s Heroes, OK! claims.

The 19-year-old blonde beauty has devoted her life to trying to get Milo Ventimiglia, 31, kicked off of the show after her bitter breakup with the actor, according to a snitch.

“She refuses to be on the set at the same time as him,” a mutual friend of the stars spilled to the tab this week. “She is making it difficult for everyone involved.”

As for Milo, “He’s not going to play any games or stoop to her level,” the insider adds.

Perfect example of why it’s a bad idea to date people you work with….Not to mention the problems that arise when men in thirties date teenage girls….

A pregnancy scare may have caused the recent bust-up of Hayden Panettiere and Milo Ventimiglia’s controversial May-December romance.

The test proved negative, but apparently caused friction that sparked the breakup, says one snithcing spywitness.

The Heroes co-stars called it quits this week after more than a year of dating, citing “lifestyle conflicts” as the reason for the split.

The Heroes co-stars have reportedly ended their year-long May-December romance due to a “lifestyle conflict.”

“It was a lifestyle conflict… (She) is young. She likes to go out in the Hollywood scene and that’s not his style. (Ventimiglia) has been concentrating on work, on his production company,” an Us Magazine insider has revealed.

At 31, Milo is 12 years older than the 19-year-old Hayden.

Milo Ventimiglia, also known as “Hayden Panettiere’s arm piece,” visited The Bonnie Hunt Show on Monday, where the star spoke at length about the third season of NBC’s hit sci-fi drama Heroes.

Actor Milo Ventimiglia shared a few gems from the new season of NBC’s Heroes with the cast of The Today Show on Monday, September 22.

Hayden Panettiere performed a surprise striptease for boyfriend Milo Ventimiglia’s thirty-first birthday earlier this month.

The eighteen-year-old Heroes actress, who portrays cheerleader Claire Bennett on the NBC sci-fi hit, devised a sexy cheerleader romp before stripping down to reveal red lingerie, an In Touch Weekly source says.

“Hayden gave Milo an unforgettable birthday surprise by morphing from her bouncy cheerleader character in Heroes to a bump-and-grind striptease.”

“She asked the wardrobe girls to make her a Velcro lined version of the outfit she wears on the show. As she sang ‘Happy Birthday’ to Milo in front of cast and crew during lunch she ripped off the costume to show off her sexy red lingerie. Milo’s face went bright red.”

Heroes star Milo Ventimiglia visited Jimmy Kimmel Live on Wednesday night.

Milo Ventimiglia chatted about the new season of Heroes with Regis & Kelly on Monday.

Teen actress Hayden Panettiere is fueling October tabloid reports that she is moving in with her thirty year old co-star BF Milo Ventimiglia by checking out homes in West Hollywood last week. “Hayden just started looking for a house.” The eighteen year old blonde lives with her family in a cozy condo in West Hollywood, but she’s been telling friends that she wants to live with Milo.

“Hayden and Milo can’t deny that they’re a couple. Now that their secret is out, they figure they might as well do what they want-even move in together,” a spy dishes to In Touch.

Hayden Panettiere and Milo Ventimiglia have offer evidence that they are a couple. Hayden and Milo were caught shopping together, and holding hands. The couple saw Atonement at a Los Angeles theater, and were caught kissing during the movie.