  We present Jordan-Brans-Dicke and general scalar-tensor gravitational theory
in extra dimensions in an asymptotically flat or anti de Sitter spacetime. We
consider a special gravitating, boson field configuration, a $q$-star, in 3, 4,
5 and 6 dimensions, within the framework of the above gravitational theory and
find that the parameters of the stable stars are a few per cent different from
the case of General Relativity.
