The former Suits actress spoke about a number of topics at the Making A Difference Together event - including support for women's empowerment movements like Time's Up and #MeToo.
Harry also praised the foursome's ability to work together.
'We have different opinions and they work really well [together]. Working as family does have its challenges; of course it does,' he told the forum. '[I think] the fact that everybody is laughing shows they know exactly what’s it like. But we are stuck together for the rest of our lives.'