Another pair of co-stars have found romance onset.

US actors Jennifer Morrison, 33, and Sebastian Stan, 28, have hooked up after meeting on the set of TV show Once Upon A Time.

Coincidentally, the new couple are no strangers to dating colleagues.

Morrison was once engaged to co-star Jesse Spencer from the medical series House, while Stan dated Leighton Meester after they met on the set of drama series Gossip Girl.

A source told People magazine: "(Morrison and Stan)... are now exclusive. They started dating three months ago. They seem to be really happy together, but are trying to take things slow."

This article was first published in The New Paper.