According to Reuters, Shar’a—who previously led an extremist militant group and for whom the U.S. government had once offered a $10 million reward—will become the first Syrian head of government to set foot in the White House.

As announced, he is expected to join the U.S.-led global coalition against ISIS.

The presidents of Syria and the United States are also expected to discuss plans for rebuilding Syria after years of civil war during their meeting on Monday.