The Citizens made the announcement on their official Facebook account on Friday.
“The young men are among the most gifted and promising talents in the country. The duo have attracted interest from other PSL clubs and Europe, but have chosen to forge their professional football careers in the Blue & Gold,” said City in a statement.
“We are happy once again to promote the very best in Cape football talent, and are certain that under the roof of Cape Town City FC these boys will achieve great things.”
Roberts, 18, is an attacking midfielder, while George, 17, is a striker.