  We address the long time behavior of solutions of the stochastic Korteweg-de
Vries equation $ du + (\partial^3_x u +u\partial_x u +\lambda u)dt = f dt+\Phi
dW_t$ on ${\mathbb R}$ where $f$ is a deterministic force. We prove that the
Feller property holds and establish the existence of an invariant measure. The
tightness is established with the help of the asymptotic compactness, which is
carried out using the Aldous criterion.
