Kristen Bell, otherwise known as the title character from Veronica Mars, will have her own story arc on Heroes when it returns for its second season this fall. Though little is known about her character, there is some information that says that she's intimately connected with the H.R.G./Claire storyline, as well as Peter's death.
This is a pretty good get for Heroes, as Bell has been desperately sought out since Mars' cancellation. Just last week she turned down the opportunity to have a recurring role on Lost. No word on how many episodes she's going to be in, but she will not be a series regular.
Zap 2 It.com: 'Veronica Mars' Joins 'Heroes'