Image rounded corners in QML

To my surprise, the Image component has no radius property. I tried emulating the rounded corners by putting the image in a rounded Rectangle, but it does not clip the corners.

Rectangle {    anchors.right: rectContentBg.left    anchors.top: rectContentBg.top    anchors.margins: 8    radius: 8    width: 64    height: 64    Image {        id: imgAuthor        opacity: 1        smooth: false        anchors.fill: parent        source: "qrc:/res/sample_avatar.jpg"    }}

How can I create an image with rounded corners properly?