In this work, we study an optimal boundary control for the stochastic Allen Cahn Navier Stokes system. The governing system of nonlinear partial differential equations consists of the stochastic Navier Stokes equations with non homogeneous Navier slip boundary condition coupled with a phase-field equation, which is the convective Allen Cahn equation type. We investigate the well posedness of the nonlinear system. More precisely, the existence and uniqueness of global strong solution in dimension two is established and we prove the existence of an optimal solution to the control problem.