How could I achieve a smaller, more rounded chin? (photo)

I wouldn't say my chin is too big, but it is quite square, and I feel it sticks out (particularly when I smile). I'd like to achieve a smaller/rounder chin and a cleaner jawline. Would I benefit from a chin reduction perhaps? Or something else? I've attached two photos: the first being an example of how my chin sticks out when I smile. The second, an edit of what I'd like to achieve, alongside an unedited photo.