Create a Python script to convert a given list of integers to a new list of strings.
[1, 2, 3]
def to_string_list(lst):
    return [str(x) for x in lst]

int_list = [1, 2, 3]
string_list = to_string_list(int_list)
print(string_list)

## Output
['1', '2', '3']