The Heroes co-stars were very clearly holding hands at the movies in LA.
Not exactly make out status, but definitely enough evidence to determine their relationship (in case you needed more).
First of all, he's just enough years older than her that it borders on inappropriate (given her youth).
Their relationship actually violates the "half his age (rounding down) plus seven" rule (she'd have to be 22 to get back in compliance). Did they really fool anyone by starting to date "after" she turned 18?
I apologise deeply for any pain that was inflicted.