The German-American, who was born in Florida, has represented German club Bayern Munich’s senior team twice this season, reports Xinhua.
“We are absolutely thrilled that Julian has chosen to be part of the US National Team Programmes,” said US national team head coach Jurgen Klinsmann in a statement.
“As we have said, he is a very special talent. We wanted him to feel comfortable with our program and listen to his heart when making this decision. I personally want to thank Kalle Rummenigge and everyone at Bayern Munich for their support through this process. He is an exciting player with a tremendously bright future.”