On October 16, 2015, Sonnett received her first senior call-up to the U.S. women's national soccer team (USWNT) from Jill Ellis.[1] She received her first cap and start (while still a student at UVA) for the USWNT on October 25, 2015 at center back during a friendly against Brazil as part of the USWNT's 2015 FIFA Women's World Cup victory tour.[2][65] She earned three more caps with the USWNT before the end of 2015 in friendlies against Trinidad and Tobago and China.[66][67][68]