10 Celeb Couples Who Are Really, Really Good at Keeping Their Pregnancies a Secret

These super-sleuths stars managed to keep their pregnancies under wraps for months

LEIGHTON & ADAM

The couple of our teen dreams (It's Blair from Gossip Girl and Seth from The O.C.!) didn't let on to the fact that they were expecting their first child together until, well, they stepped out with undeniable evidence. They welcomed daughter Arlo in August 2015.