The Nativity Story/Trivia

Actor Allusion: Ciaran Hinds plays the role of a ruler. Now where have we seen that before?
Contractual Purity: Keisha Castle-Hughes's real-life teen pregnancy was no Virgin Birth.
Fake Nationality: Keisha Castle-Hughes is from New Zealand, Ciaran Hinds and Stanley Townsend are both Irish, and Oscar Issac is Guatemalan-born, but American. Averted with Shohreh Aghdashloo, who is of Middle Eastern descent (Iranian). Subverted with the Sudanese-born (but English-raised) Alexander Siddig.
Hey, It's That Guy!: While Gaius Julius Caesar has his run of Judea, Dr. Bashir notifies Pai that she has a bun in the oven. Prince John decides to remain in the marriage, as the child will need a father. Dina Araz is also pregnant, despite being past child-bearing age.