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Hayden Panettiere is opening up about her life in her new book, This Is Me: A Reckoning, <\/em>including her famous exes.<\/p>\n<\/div>\n<\/li>\n Panettiere dated her Heroes<\/em> costar Milo Ventimiglia back when she was 18 and he was 30.<\/p>\n<\/div>\n<\/li>\n “At 18, I lived so much life that he almost couldn’t count me as being 18,” she tells EW.<\/p>\n<\/div>\n<\/li>\n<\/ul>\n Hayden Panettiere<\/a> is looking back at her past relationship with former Heroes<\/em> costar Milo Ventimiglia<\/a> with a new life experience.<\/p>\n \u201cThat’s hard. My daughter’s 11, so I’m trying to think of how I would feel,\u201d Panettiere, now 36, tells Entertainment Weekly<\/em><\/a> in an exclusive interview<\/a> about her upcoming book, This Is Me: A Reckoning<\/em>, when asked about her nearly 12-year age gap with Ventimiglia.<\/p>\n \u201cI’m sure she’s going to do exactly what Mommy did,\u201d the actress continues. \u201cI’m ready and prepared for it, but I think it’s about the person. I was working with him all the time. My family knew him well. I was also … At 18, I lived so much life that he almost couldn’t count me as being 18. So Milo and I, even though he was 30, had a lot more in common than people might think.\u201d<\/p>\n Panettiere and Ventimiglia, now 48, met on the set of NBC\u2019s Heroes<\/em>, playing cheerleader Claire and hospice nurse Peter, respectively, in 2006. The pair dated for nearly two years, starting their romance when she was just 18 and he was 30. They called it quits in 2009.<\/p>\n \u201cBut if it was somebody that was inappropriate, if it came off inappropriate or was somebody that my parents were like, \u2018No, this is just a creepy situation,\u2019 then they never would’ve allowed it to happen,\u201d Panettiere adds.<\/p>\n The Nashville<\/em> alum writes about Ventimiglia in her new book, out May 19.<\/p>\n \u201cEvery relationship I\u2019ve ever been in, I invested my whole self in,\u201d she told Us Weekly <\/em><\/a>when asked about Ventimiglia earlier this month. \u201cI saw him as my partner and that it was going to hopefully keep going and evolving and lead to marriage.\u201d<\/p>\n She noted that the relationship was formative for her.<\/p>\n