Megan's outstanding club form in the 2011/12 domestic season brought her to the attention of the Welsh selectors. Her rapid rise from obscurity saw her earn her first cap as a 67th minute replacement against Scotland at Cross Keys during Wales' comfortable 20-0 victory.

The powerful prop scored her first try for her country in the 2013 RBS 6 Nations championship. Her try had appeared to give Wales victory but England hit back in the dying stages to snatch the win.