I agree with Ursus, in that the Gladiator scene of Maximus venerating tiny figurines of his family members (both while they were still alive and after their death) seemed "more Hollywood than history".
I noticed in HBO's Rome that in the scene where Vorenus and Pullo were shipwrecked, Vorenus was shown to be carrying a small portrait of his wife -- much as one today carries a family photo in one's wallet. I wondered, too, about the authenticity of that.
We know that the Romans used imagines (waxen death masks) for ancestral remembrance, and we see an example of these in a few scenes in HBO's Rome, where lighted death masks of past Junii adorn the walls of Servilia's personal chambers.
During funeral processions, illustrious families with numerous ancestral death masks in their possession would hire actors to don these death masks and join the procession, so that spectators might take note of past consuls, aediles, or other noteworthy ancestors of the deceased.
Still-living family members were represented by lifesize portrait busts within the home. Sometimes, the portrait bust of a female member of the family might be sculpted with a detachable headdress, as hairstyles were likely to change in Rome and this would be a money-saving means of keeping representations of living family members up-to-date.
-- Nephele