How can I place a Label in the middle and an Image a little to the right of the Label in a GridLayout?

Question

Kivy

There are two widgets in GridLayout in kv file. These are Label and Image. I need to place the Label in the middle and the Image just to the right of the Label. How can i do this ? Here is my kv file:

<MainScreen>
    # ButtonFloat:
    btns: btns

    GridLayout:
        cols: 1
        Label:
            text: root.message

        GridLayout:
            cols: 2
            Label:
                id: 'mylabel'
                text: root.message_one
            Image:
                source: 'img/icon-back.png'
            
        GridLayout:
            cols: 3
            id: btns