Who will lead Iran now?

The immediate picture inside Iran and the big unknowns ahead

State media in Tehran reported the appointment of an interim leadership team after the attacks that killed the country's supreme leader. That step was presented as a stopgap to keep government institutions functioning and to manage an immediate security response. Beyond the formal interim announcement, the country faces a period of acute uncertainty.

Iran’s political structure gives power to several institutions that can influence succession: the clerical establishment, the presidency, the Islamic Revolutionary Guard Corps (IRGC), and the security services. The IRGC has grown in capability and political weight in recent years, and analysts note its ability to assert control over key levers of power during moments of crisis. At the same time, Iran’s constitutional and informal processes — including councils of clerics and other senior religious figures — remain relevant to legitimizing any successor.

Key dynamics to watch in the coming days and weeks:

• How unified Iran’s senior political and military elite remain behind an interim arrangement;
• Whether security organs, including the IRGC and regular armed forces, consolidate control over state institutions;
• If clerical bodies move quickly to name a long‑term successor or open a contested process that could fragment authority.

Internationally, the death of the supreme leader has prompted immediate diplomatic and security responses: neighboring states and global powers are recalibrating positions, and the U.N. and other multilateral actors have called for restraint. It’s still unclear how durable the interim arrangement will be, who will emerge as the long‑term authority, or whether rival factions inside the regime will trigger a prolonged power struggle.