In the final scene of the (brilliant) film Mockingjay Part 2,
Katniss and Peeta appear in a field together with their two young children.
I noticed in the end credits that
both of the actors playing these children have the surname Lawrence.
Surely this is not a coincidence, since both the lead actress and the director of the film share the same surname. But they are not related, so which (if either) of them are the two new actors related to?