President-elect Donald Trump has chosen Karoline Leavitt to be his White House press secretary, meaning the longtime Trump advocate will soon be the youngest White House press secretary in history, and potentially one of the administration’s most visible figures.

President-elect Donald Trump reached into his inner circle on Friday and chose his transition spokesperson, Karoline Leavitt, as his White House press secretary, putting a 27-year-old firebrand in position to aggressively defend him.

Ms. Leavitt, 27, who served as his campaign’s press secretary and worked in the White House during his first administration, will be the youngest person ever to assume the role.