With no Milo Ventimiglia in sight, Hayden Panettiere had a much younger man, her brother Jansen, on her arm at the premiere of The Spiderwick Chronicles in LA last night. Hayden's still a family girl at heart, but earlier this week that backfired a bit. At Wednesday's Old Navy party mom Panettiere's dress was a little too risqué for her daughter's taste and Hayden had to leave the dance floor in order to try and keep her mother decent.