Seyyed Mohammad Hosseini (Persian: سید محمد حسینی, born 4 July 1969) is a US-resident Iranian showman, political activist, radio host, and founder and current leader of an Iranian opposition group called "Restart."

In 2011, Hosseini immigrated to the United States as a political refugee and became a vocal advocate against the Islamic Republic of Iran.

[1] In the US, he has started an opposition group called "Restart" which is currently active against the Islamic Republic.

Hosseini encourages his followers to attack the Islamic Revolutionary Guard Corps and Basij bases and government buildings throughout the country as part of his plan to cause the collapse of the government.

[2] The Restart movement led by Hosseini claims to have some 20 million international followers and describes itself as the largest opposition group against the Islamic Republic of Iran.