Britain's Prince Harry isn't interested in applying for a green card or dual citizenship. "The duke has not made an application for dual citizenship and I don't think he will apply for a green card at any point," a royal source revealed.

However, like anyone moving to the U.S., Harry will eventually have to choose in what capacity he will stay in the country. The Duke and Duchess of Sussex have struck a deal with Netflix and royal author Angela Levin said the prince's nationality could be a problem as he starts working in the U.S. as a British national.

Harry is living in the U.S. with Meghan Markle and their son, Archie, after he turned his back on royal life. The couple announced in January they would be stepping down as senior royals. Two months later, the couple officially withdrew from their roles.

With Markle being a U.S. citizen, she can easily sponsor Harry to become a green cardholder. This option will grant the younger son of Prince Charles and the late Princess Diana indefinite leave to remain in the U.S.

However, "Harry is still English. Isn't there a problem about having a job and earning money in America?" she tweeted.

It has been reported Harry has less than a month to apply for U.S. residency. To be considered a resident, one must not be out of the U.S. for 183 days - known as the "substantial presence test." The duke has been in the country for 159 days since he and Markle left Canada and settled in California.

If Harry is to pass the "substantial presence test" he will be counted as a U.S. resident. However, it can be rebutted by certain situations, such as being a resident in another country, and more.

Meanwhile, Levin has said on talkRADIO that Harry may be forced to separate from Markle as he reportedly needs to return to the U.K. because of visa issues. She said she doesn't think Markle and Archie will return with the duke because the former actress has said her life as a royal was "horrid" and "ghastly in every way."