'Empire' Stars -- Boo Boo Kitty Hooking up With Andre Lyon ... For Real!

"Empire" stars Andre Lyon and Anika Calhoun are family on-screen ... but off-screen the actors may be hooking up.

Check out this video of Trai Byers, who plays Andre, and Grace Gealey, the now-famous Boo Boo Kitty. They went to a wedding together and people who went to the reception tell us they were super affectionate at times, but still conscious people were looking.

The bride and groom -- Lauren Whitney Johnson and Cedric Sanders -- are both actors, but nowhere near as famous as Lucious' oldest son and ex-fiancée.