First lady Melania Trump’s parents officially became citizens of the U.S. on Thursday in New York City.

Viktor and Amalija Knavs took the citizenship oath alongside their lawyer, who said the process and interviews were no different than anyone else’s, other than security arrangements for Thursday’s interview.

It’s unknown when Viktor and Amalija had first moved to the U.S., but they have been living as legal permanent residents while awaiting the naturalization oath ceremony, according to The Associated Press.

NEW: First lady Melania Trump’s parents, Viktor and Amalija Knavs, have been sworn in as U.S. citizens, their attorney says outside a New York City courthouse today. https://t.co/BIy7Lpczh1 pic.twitter.com/jlG4tRjkJ3 — ABC News (@ABC) August 9, 2018

Viktor, 74, and Amalija, 73, raised Melania in the rural industrial town of Sevnica, Slovenia, where Viktor was a car dealer and Amalija worked in a textile factory. (RELATED: LEGALLY! — Melania’s Parents Are Becoming Americans The Right Way)

There has been speculation of the Knaves immigration standing in recent months, with many believing the first lady’s parents entered the country through the “chain migration” process, which President Donald Trump has made repeated calls to end.

An immigration lawyer told the Washington Post that there were two probable ways Trump’s in-laws obtained green cards: through sponsorship by their daughter or an employer.

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