Hayden Christensen’s girlfriend, Rachel Bilson might drive a Prius but that doesn’t mean he has one too! Hayden was spotted valeting his Audi R8 with a friend at Chateau Marmont recently. Just a few days ago Hayden was also spotted filling up the R8 with Rachel Bilson in the passenger seat. Rachel might be environmentally friendly but it looks like she doesn’t mind running around in a super car every once in a while.