Supporting Serena in the front row were celebrities such as Kim Kardashian West, Ashley Graham, Gayle King, LaLa Anthony, Tarana Burke and husband, Alexis Ohanian.
The Duchess of Sussex, who flew from the UK to the US to watch Serena play in the US Open women's finals, has already shown her support for the clothing range, wearing a blazer from Serena's previous range while in Australia last year.
With the royal's tour of South Africa coming up in a few weeks, we wouldn't be surprised if Meghan gave one of these runway pieces a whirl IRL.
WATCH: Meghan Markle watches Serena Williams lose US Open Final
This article originally appeared on marie claire Australia