  Solitonic scalar field configurations are studied in a theory coupled to
gravity. It is found that non-topological solitons, Q-balls, are present in the
theory. Properties of gravitationally self coupled Q-balls are studied by
analytical and numerical means. Analytical arguments show that, unlike in the
typical flat space scenario, the size of Q-balls is ultimately limited by
gravitational effects. Even though the largest Q-balls are very dense, their
radii are still much larger than the corresponding Schwarzschild radii. Gravity
can also act as a stabilising mechanism for otherwise energetically unstable
Q-balls.
