The pair met on the set of their movie Jumper in 2007 and split briefly in 2010, but they reconciled after a few months and have been together ever since.
They also have a daughter together, Briar Rose, who was born in October 2014.
According to Us Weekly, Rachel and Hayden are "completely, officially done", and she has been living in LA while he's in Toronto.
Fans are, of course, devastated, and taking this as proof that love really is dead.
Thanks a lot, 2017.
Representatives for both Bilson and Christensen have been contacted by BuzzFeed News for comment.