The Canadian-born basketball player fulfilled the requirements to become a naturalized citizen last week, according to the US Citizenship and Immigration Services, which shared the news on Twitter along with a photo of the NBA star taking the oath of allegiance.
"I came to the US on a student visa and have always had big dreams. I'm now truly living the American dream," Thompson said.
The 29-year-old father of two was born in Brampton, Ontario and moved to the US as a teen to attend high school in New Jersey.