Mojtaba Khamenei, 56, enters power as the Islamic republic faces its most serious crisis.

The 56-year-old Mojtaba Khamenei is set to continue leadership of Iran in the same vein as his father

Many expect the 56-year-old, who has largely kept a low profile, to continue his father's hardline policies.

Mojtaba Khamenei is to replace his father as Iran’s new supreme leader