In this report, a study of stochastic and optimal aggregation of electric vehicles (EVs) in smart distribution grid is presented. The analyses of base cases in the distributions grid connected with EVs show the bottleneck of the system operation. The ability of supporting EVs of the grid is investigated. The stochastic process of the driving pattern is done to make the outcome of the project more realistic. Based on the stochastic data, the optimization of charging plans is made.