Salma Hayek
The Mexican star moved to the United States in 1991 to study acting. She remained in the country after her visa expired.
"I was an illegal immigrant in the United States," Hayek told the Spanish edition of V magazine in 2010. "It was for a small period of time but I still did it."
Her immigration status was quickly remedied after Hayek returned to Mexico and renewed her visa. The actress became a naturalized U.S. citizen in 2013.
Sofia Vergara
The Colombian Modern Family actress became a naturalized U.S. citizen in 2014.
"It took me a lot of time to get my residence even though I was working here for a long time," she said on Jimmy Kimmel Live! "But it was fun and I got all my questions perfect."
Nicole Kidman and Keith Urban
The Australian-born couple are also U.S. citizens.
Pamela Anderson
The Canadian-born actress moved to the U.S. in the late '80s and became a dual citizen in 2004.
Natalie Portman
The actress was born in Jerusalem and immigrated with her family from Israel to the U.S. when she was 3. She has duel citizenship.
Charlize Theron
The South African actress obtained U.S. citizenship in 2007.
"You're stuck with me now," she told David Letterman on The Late Show the following year.
Emily Blunt
The British actress and wife of John Krasinski has lived in the United States since 2008 and became a naturalized citizen in 2015.
Camila Alves
Matthew McConaughey's wife, who is originally from Brazil, got sworn in as a naturalized U.S. citizen at the same ceremony as Emily Blunt.