Things may get a little awkward on the set of hit TV show “Heroes” with word that co-stars Hayden Panettiere and Milo Ventimiglia have ended their romance.

“It was a lifestyle conflict,” an insider told Us Weekly magazine, suggesting that the 12-year age gap between Panettiere, 19, and Ventimiglia, 31, may have been a factor in their split.

“They were in very different places,” added the source. “[Panettiere] is young. She likes to go out in the Hollywood scene and that’s not his style.”

Ventimiglia meanwhile, “has been concentrating on work on his production company [Divide Pictures],” according to the mag.

Heroes co-stars and lovers Hayden Panettiere and Milo Ventimiglia might be getting engaged soon.

The couple have been dating since January and were recently spotted in L.A. doing some Cartier ring shopping, reported OK!

Hayden is only 18 years-old, but is obviously head over heels about her 30 year-old boyfriend!

Read more:

Hayden & Milo Engaged? - TheseBootsAreMadeStalking

Sloppy Seconds: Is Hayden Engaged? - Scanner