Of the split, an insider tells Us magazine, “It was a lifestyle conflict. They were in very different places. [Hayden] likes to go out in the Hollywood scene and that’s not his style."
Claiming that there's no need to worry about tension the the set of their hit show "Heroes", the source adds, "They are still on friendly terms. There are no hard feelings.”
Meanwhile, you can catch Hayden and Milo on an all-new episode of "Heroes" called Building 26, which airs later tonight at 9/8C on NBC.
Of the episode, the show's Web site tells: "Nathan's (Adrian Pasdar) plans face exposure as Homeland Security begins an investigation under direct orders from the President of the United States. Sylar (Zachary Quinto) and Luke (guest Dan Byrd) embark on a road trip to find Sylar's father, but are secretly being hunted by Nathan's agents. Life gets complicated for the Bennet family as Claire (Hayden Panettiere) goes into action to protect a young man with abilities (guest star Justin Baldoni) from being captured by HRG (Jack Coleman). Elsewhere, Matt's (Greg Grunberg) prophetic images lead Hiro (Masi Oka) and Ando (James Kyson Lee) to India and a mysterious ally comes to the aid of our Heroes."