The BRICS has already appeared as the main challenging rival for the Western-dominated economic model and this trend will most likely continue in coming years. Obviously, energy security would be a top priority for this new emergence coalition, particularly China and India, while Russia and Brazil are the least dependent of energy import and South Africa sits in the middle. Global energy demand will increase, so non-hydrocarbons grow faster than hydrocarbons, however natural gas is the fastest-growing fossil fuels in the energy markets all over the world. As a result, energy relationships with other hydrocarbon-rich countries, notably main gas suppliers, outside the BRICS, seem vital. Iran, as the second hydrocarbons holder worldwide with its outstanding geo-economic geo-politics and geo-strategic position, is situated in the centre of the global ‘strategic energy ellipse’ and even becomes more significant. Therefore, energy relationship between Tehran and the BRICS could be influential on both side's energy security in the future.