The €56 maternity top that Kate Middleton wore today is already sold out

The power of Kate.

On her last official royal engagement before going on maternity leave, the Duchess of Cambridge, alongside her husband the Duke of Cambridge attended a SportsAid event at the Olympic Park’s Copper Box arena in Stratford, East London. For her last outing, Kate chose to wear a top from none other than high street brand Hobbs. A favourite of the Duchess, the top is covered in a white, blue and green floral print and fitted beautifully over her bump. And although, the royal only wore this top today, it is already practically sold out online, with one size remaining. The top can be seen online here, with the option to add it to your "wish tags" and be notified if and when it is restocked. To finish the look today, Kate themed the Hobbs top with a white coat from Goat that she has previously worn and a pair of black trousers and black heels. And as the royal wedding of Prince Harry and Megan Markle gets closer and closer, we cannot wait to see what Kate will wear on the big day. More details of the wedding, that takes place on May 19 were also revealed today including what the wedding invites look like. You can read all about it here.