He continued, “People say shock can’t last that long, but it does.

You never get over it.

Similar to his brother, Harry didn’t quite process his grief as a child.

Prince Harry photographed before walking inside

Until he was about 23, the Duke of Sussex even believed his mother was still alive.

For years, he only cried once over her passing, at Diana’s burial.

Sweetly, it was a way for both princes to carry on their mothers' legacies.

Prince Harry and Zak Williams posing at events

It took him over a year to set healthy boundaries that allowed him to grieve privately.

Much like the Duke of Sussex, Williams also resorted to substance abuse to cope.

So I just kind of kept on doing it.

Zak Williams with his father Robin Williams

I love it as I find it healing personally” (viaGood Morning America).

He also co-founded a mental wellness brand with his wife called PYM, which stands for Prepare Your Mind.