Olivia Lynn Moultrie is an American professional soccer player for Portland Thorns FC of the National Women's Soccer League (NWSL). In 2019, she became the youngest American women's soccer player to turn professional, at age 13, and in 2021, she became the youngest player to play an NWSL regular-season game, at age 15. She was also the youngest player to commit to a college team and accept a scholarship offer, which she ultimately gave up, at age 11. She became the youngest player in NWSL regular-season history to score a goal at age 16 against the Houston Dash on June 12, 2022.

The Portland Thorns FC is an American professional women's soccer team based in Portland, Oregon. Established in 2012, the team began play in 2013 in the then-eight-team National Women's Soccer League (NWSL), which received support from the United States Soccer Federation (USSF).