Video and photos of an Iranian man who looks like Hollywood star Johnny Depp during an Islamic mourning ceremony in Tehran have gone viral in Iranian media.

The Depp lookalike is reportedly identified as Amin Sa'les, who apparently does some modelling gigs thanks to his uncanny resemblance to the American actor.

Sa'les lives in Iran and is reportedly from the north-western city of Tabriz. His modelling work is with local agencies.

Huge gatherings have been held in Iran and some other Muslim countries in the past 10 days, the first days of the first month of the Islamic calendar, to commemorate the third Shiite Imam Hussain.

Such ceremonies are vastly popular among Iranians as they are complemented by copious supplies of free food and drinks, known as nazri. They are given free by individuals and groups at kiosks called heyats set up all over the country.

The highlight of the month-long ceremonies of Muharram are the Days of Tasu'a and Ashura, the anniversary of the slaying of Shiite Imam Hussein and his 72 companions by his rivals to the leadership of Muslims in the 7th century.

Ceremonies have been held for centuries in Iran and among Shiites in other countries, marking the event in the 680 AD battle of Karbala, in present-day Iraq, and have gained greater state support since the 1979 Islamic Revolution.