Mormon missionaries in Barcelona. Greg Robbins via Flikr You'd never guess that these famous people are Mormons. They'd never guess it either, considering that they didn't exactly consent to becoming Mormons.

Posthumous baptisms allow Church members to give non-Mormon relatives a chance to get into heaven after death.

Technically, a proxy baptism doesn't mean an automatic conversion for the dead person. The soul of the deceased needs to consent to the baptism from beyond the grave in order to make the switch final. The soul could reject the chance to convert.

When someone is baptized posthumously more than once, that just means more chances to confirm or decline.

Some people don't take kindly to the offer. In 1995, the Church said it would stop baptizing Holocaust victims, after it was revealed that tens of thousands had been added to a list of baptized individuals.

Elie Wiesel, the famous Holocaust survivor and memoirist, called on Mitt Romney to tell the Church to stop baptizing Holocaust victims after Helen Radkey, a researcher and ex-Church member, discovered his name on a list of names "ready" for baptism.

Members of the church have access to a database of people who have been baptized after death.