If a US citizen marries a visiting UK citizen in the US would the UK citizen become a US citizen and what would he have to do to become one?
No, the UK citizen would not become a US citizen. First the UK citizen would have to apply through INS for a work permit and perminent residency. The work permit will be issued within month (probably), but perminent residency could take 18 months or more; during which time the applicant would be expected to remain and work in the US (short overseas visits sometimes permitted). Once perminent residency has been established a 'green card' will be issued and 3-5 years after this the immigrant can apply for US citizenship.
If an American citizen marries a filipino citizen in the Philippines would it make him a filipino citizen also?
If an American citizen marries a Brazilian citizen in Brazil does that person become a Brazilian citizen?
No, not unless you start the paperwork in Brazil. You would have to give up your US citizenship to become a citizen of Brazil. Your new spouse doesn't become a US citizen either through marriage and they would have to apply for citizenship here too. Only being born in the US makes a person an automatic citizen.
Does a permanent resident with a valid green card become a U.S. citizen if he marries another U.S. citizen?
What happens if a Queen Marries... Like if a Queen of a set Nation is already that Monarch and she marries will the person she marries become automatically King and become the ruling Monarch or not?
No................. The only way they can become a US citizen would be to go back to their home country and then apply for a fiance visa, and then you have to go through all kinds of forms to make it happen. It is pretty well cut and dried here, once an illegal, always an illegal, unless you go through the proper channels. Go to USCIS.gov
If a us citizen marries a Mexican citizen and they live in Mexico will the us allow her to have dual citizenship Mexico and us?
In order to marry a Zimbabwean citizen in Zimbabwe, a foreign citizen must apply for and gain citizenship. If the wedding is to take place in the United Kingdom, if the British individual has been a citizen for three years, all that is required is that the Zimbabwean citizen not have committed any crimes, and marries the UK citizen. This would lead to citizen ship for the Zimbabwean spouse.