I think the first question mark is going to be
a group of three lozenges arranged in a roughly heart-shaped formation:
and the second one will be
the head of a trident.
In case these still don't seem all that obvious, the actors are (Thanks, @ed-murphy)
Morgan Freeman, Christopher George, Ben Kingsley, and Jeff Bridges
which, at least if you are a little bit weird, will immediately bring to mind
In particular, these ones:
Freetown, the capital of Sierra Leone,
Georgetown, the capital of Guyana,
Kingstown, the capital of Saint Vincent and the Grenadines, and
Bridgetown, the capital of Barbados.
(As @Stiv helpfully points out in the comments, the hint in the title is typed in "all capitals", suggesting we're most likely on the right track. The count in the hint also agrees, at least if we ignore the (super hero themed?) legislative capital of South Africa.)
The respective patterns then are the
borders between the colours in the flags of these countries.