While filming The O.C., Adam and Rachel's onscreen romance led to an IRL relationship, though the actors decided to split after three years of dating. However, they continued to play Seth and Summer until the show ended in 2007, and their characters even got married.
The former couple has kept quiet about their on-set relationship post-breakup, but a run-in at an airport proved that there's no bad blood between the two. In August 2019, Rachel posted an Instagram from JFK, where she coincidentally ran into her ex. "Ran into my ol buddy from jfk to lax #californiaherewecome," she captioned the selfie.