Asos, River Island, Karen Millen and Revolve have all got glitzy frocks that will do the trick at a fraction of the price.
Behati, 26, chose a custom-made wedding dress by red carpet favourite Marchesa.
In 2009, Brady married Brazilian super model Gisele Bundchen. In no way is that more obvious than those shorts he's wearing on his romantic stroll with Lima.
But there are plenty of embellished dresses on the virtual high street that will give you Ale's look.
One of the reasons that Di Caprio could be trying to keep his romance on the DL?
He's earned the reputation for being quite the modelizer.
A multipart study from Harvard University, University of La Verne and Santa Clara University researchers found that beautiful people are more likely to be involved in unstable relationships.
In one part, the researchers looked at the top 20 actresses on IMDb and found that they tend to have rocky marriages.