Rachel Bilson and ex Hayden Christensen were "both ... revealing that Planet Oat's dairy-free products made it an easy transition for the entire family. "[Hayden and I] were both totally on ...

Rachel Bilson famously dated Star Wars star Hayden ... "But I do think she has a great Instagram and it is very easy to comment on her content." Later, Viall confirmed the two had dinner together ...

Young love can be complicated when it blossoms between a pair of co-stars, but that didn't prevent "The O.C." stars Rachel ...