SharePoint Column Formatting - Rounded images

Is recently had the need to show a picture column in a SharePoint list as a Persona element as provided in the Office UI Fabric. Now if it came down to it, it was just enough to have an image with a border radius, and not all the other mumbo jumbo from Persona.

The result looks as follows: Column formatting image to persona

The json to put in the column formatting pane:

    "$schema": "",
    "elmType": "div",
    "children": [
            "elmType": "img",
            "attributes": {
                "src": "@currentField"
            "style": {
                "width": "100px",
                "border-radius": "50%"