I want to Align an item to the right in qml

[trupti007]

Column {
                    id:column
                    spacing: 10
                    width: parent.width
      Repeater{
          model:5
                       Row {
                                  leftPadding:17
                                  topPadding:10
                                  spacing: 10
                                    Image {
                                             id:img
                                              height: 50
                                              width: 50
                                              source:"icon.png"
                                     }
                                    Text {
                                        text:"User_name"
                                        topPadding:12
                                   }
                                    Rectangle{
                                        height: 40
                                        width:40
                                        color: "#333333"
                                        Layout.alignment: Qt.AlignRight
                                    }
                                }
      }

  }
I have Used Layout.alignment: Qt.AlignRight to show the rectangle to the right, But its not working. I don't understand why It is not working, I have also tried Layout.fillWidth: true inside an Item but still not working