The rumors have been around since at least September, but now Hayden Panettiere have escalated their relationship up another level.
Though they have denied being a couple, People magazine is now reporting that the Heroes costars are dating.
And if People is reporting it, then it must be true! Hayden's publicist probably confirmed the story off-the-record!
"Hayden's mom adores Milo. She thinks he's so cute," a family friend tells the magazine. "She tells her friends that he's her boyfriend. She's very proud."
We're sure Lesley's all over it! The fact that Hayden is 18 and Milo is 30 probably doesn't bother mommy one bit!
On a December trip to New York City, Ventimiglia hung out with the entire Panettiere family. "He's even met her grandparents. He fits in perfectly with the family. Milo jokes around with her little brother," says the source. "They're buddies."
When the couple are together, "they're very affectionate and very comfortable around each other. He really takes care of her, even down to the little things like giving her a back massage and going with her to work."
"They're not afraid to show their affection around her family and their friends," says the friend.
We're already praying to the Gossip Gods that Hayden ends up pregnant and dumped by Milo next year.
How hot would that be????