Mate the then-soon-to-be-Mrs TD (the lucky girl) and I flew EK from London to Sydney for the ceremony, complete with wedding dress in a suit-carrier. Not even
that got us any favours (and I was Skywards silver).
After the stress of the week in Sydney we decided to pay for the upgrade for the way back. As we were by that stage on honeymoon, we'd hoped maybe a sector or two right up the pointy-end... no dice.
That was a few years ago, though, and I understand things have changed then... not necessarily for the better.
The usual way would be to be a gold FFP member.
If you get lucky, do share the secret with the rest of us here, though!