  We develop the large $D$ limit of general relativity for spherically
symmetric scalar fields in both asymptotically flat and asymptotically anti-de
Sitter spaces. The leading order equations in the $1/D$ expansion can be solved
analytically, providing a large $D$ description of oscillating soliton stars.
When the amplitude reaches a critical threshold, certain divergences occur
which we interpret as signal of horizon formation. We estimate the size of the
resulting black hole and obtain, with respect to that definition, a Choptuik
scaling exponent for our family of solutions.
