Preheat oven to 350F degrees or 180 C
First of all, mix cream cheese and butter in a bowl, until blended. Add milk slowly and mix until smooth.
Add in shredded chicken, diced green onions, diced green bell pepper, salt and pepper. Mix to combine. Lightly flour kitchen top surface and carefully unroll the prepared croissants pastry.
Arrange it to 4 rectangles or squares and pinch together the seams if the croissants are precut to triangles. Spoon 1/4 of the chicken mixture in the centre of each croissant rectangle, bring corners together and twist and pinch to close.
Brush the pastry over with a little milk using a pastry brush. Bake for 18-22 minutes until golden brown. Remove from oven and serve.