Hayden Panettiere performs at the Netflix Live! on Location concert with her “Band From TV” on Saturday at the Autry National Center Of The American West in Los Angeles.

Photographing the 18-year-old hottie below the stage was her boyfriend, fellow Heroes costar Milo Ventimiglia, 31. Performing with Hayden was Chuck’s Zachary Levi, Bachelor’s Bob Guiney, Heroes’ Greg Grunberg and Lost’s Jorge Garcia.

“Band From TV” is a charity cover band, whose members are all actors from American television series, who donate the proceeds of their performances and recordings to the charities of their choice.

70+ pictures inside of Hayden Panettiere going Netflix Live… More Here! »

Heroes hottie Milo Ventimiglia celebrated his 31st birthday earlier this month with some real-life heroes — U.S. soldiers!

The television star took a break from shooting his hit NBC series to visit the military troops on a USO tour, spending nearly a week in Iraq, Kuwait and Afghanistan. The troops even presented him with a birthday cake for his efforts!

“The tendency is for people to just read the news and talk about the war,” Milo has said. “That wasn’t enough for me. To be able to come out here and say ‘thank you’ was important to me. It made me really happy to see smiling faces. That’s what it is all about, knowing I made their day.”

He added, “My father’s a veteran, my uncle’s a veteran, my grandfather was a veteran. I nearly went into the Navy myself when I was 18. So I got a chance to go overseas and give the men and women of the armed forces a little bit of a respite.”

And apparently the troops keep up with Heroes! Milo shared, “When I was over in Iraq and Afghanistan, a lot of soldiers were like, `Dude, will you just kill Sylar already? Will you just get rid of him?’ And I’m like, `Man, I don’t know if you’re gonna want that just yet. I think you’re going to be very surprised as to what happens.’”

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Hayden Panettiere and her costar/boyfriend Milo Ventimiglia share a few laughs with each other while promoting their hit NBC show, Heroes, at Comic-Con 2008 on Saturday at the San Diego Conference Center in San Diego, Calif.

Hayden, 18, and Milo, who turned 31 earlier this month, made sure not to stand and/or sit next to each other to avoid additional speculation from their relationship.

Heroes returns with all-new episodes starting with its 2-hour season premiere @ 9PM ET/PT on Monday, Sept. 22.

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Hayden Panettiere and costar Milo Ventimiglia get a little frisky with each other in between takes on the set of Heroes in Los Angeles on Saturday.

The loved-up couple playfully cuddled up behind a trailer, whispering in each other’s ears. Why was Milo gently pushing Hayden up against the trailer?? Hmm??

Hayden, 18, and Milo, 30, were later seen grabbing lunch together from the catering tent before returning to their trailers. The couple has been dating since late last year. Milo (Peter) plays the uncle of Hayden (Claire) on Heroes.

30+ pictures inside of Hayden and Milo getting hot and heavy on the set of Heroes… More Here! »

Heroes hunk Milo Ventimiglia, aka Peter Petrelli, works out a slick new hairdo and facial scar as he films season 3 of his his NBC drama in Los Angeles on Saturday.

Jimmy Jean-Louis, aka “The Haitian” was also on set filming scenes at the same time. And guess who also was on set? His on-screen niece and off-screen lover, Hayden Panettiere.

The two-hour season 3 premiere of Heroes airs on Monday, September 22 with episode “The Butterfly Effect.” More Here! »

Everybody together now: Awwwwww!

Hayden Panettiere and Milo Ventimiglia show some affection and give each other a big hug outside of Hayden’s trailer on the set of their TV show Heroes in Los Angeles on Thursday.

The now 18-year old actress recently shared the freedom of youth saying, “It’s great to be single. It’s great to have boyfriends. Or girlfriends. There are occasions when you kiss your best friend growing up, having fun and goofing about. Like perfecting your technique!”

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Heroes costars Milo Ventimiglia and Adrian Pasdar, aka the Petrelli brothers, grab dinner together at Nobu restaurant in London on Monday.

As we all know, Milo, 30, is a suit guy. And studying the art of the suit is on his life agenda: “Studying suit-making in Italy is something I’d love to do. My family is from Sicily and I went back there when I was 22. I’d love to return and work with a tailor to get to understand how a great suit is made.”

Mr. Ventimiglia also recently told People that he’s really pumped about the upcoming movie Indiana Jones and the Kingdom of the Crystal Skull.

Milo said, “May 22, I will be there.”

10+ pictures inside of Milo ‘n Adrian… More Here! »

Heroes costars Milo Ventimiglia and Adrian Pasdar (pictured below) walk the red carpet at the British Academy Television Awards (BAFTA 2008) at The Palladium on Sunday in London, England.

FYI: Milo, 30, and Adrian, 42, play the Petrelli brothers on the their hit sci-fi series (Peter and Nathan, respectively).

Earlier this week, Milo was interviewed on Ryan Seacrest’s radio show to hype up his new film, Pathology, in theaters now. Mr. Ventimiglia said he spent a lot time in the morgue to prepare for the role, watching 19 real autopsies and a couple hundred dead bodies.

“It was an experience I needed to fit in with the character,” Milo said. “I could really see the cold, calculated medical side as well as understand how they desensitize themselves and shut down their emotions. It gives them such an appreciation for life. To look someone in the eye when you have a conversation, to shake someone’s hand, to hug your family, to kiss a woman. Any of that stuff is so much more rich now.”

During the interview, he also denied the rumors that he was househunting with co-star girlfriend Hayden Panettiere. Listen here.

Other pictures include Milo at Thursday’s Conde Nast Traveler 8th Annual “Hot List” Party at Mansion in New York City.

10+ pictures inside of Milo Ventimiglia @ the BAFTA Awards 2008… More Here! »