Hot Heroes star Hayden Panettiere was out with her MILF mom and manager and her little brother, Jansen Panettiere, at a Halo party in Hollywood.

No, really, she was.

We all know Halo as the amalgam of Hayden Panettiere and her 30-year-old co-star boyfriend (though they deny it) Milo Ventimiglia.

But Halo 3 is also the third game in a popular video game trilogy. And they threw a big bash commemorating the game's release and Hayden went. How fitting.

Did we mention Hayden Panettiere looked absolutely tremendous in this short Roman goddess dress? Hel-lo! How come she couldn't find a date other than her bro? Oh well. We suppose it's nice that she and Jansen Panettiere hang out.

All in the Panettiere family: Hayden, Jansen and mom Leslie.