Kate Middleton
Kate Middleton, photographed while guest editing at the Huffington Post in London on Feb. 17, 2016, is speaking out about children's mental health. Getty Images

Kate Middleton showed off her street style after her stint as the guest editor of Huffington Post Wednesday. The Duchess of Cambridge changed into comfortable workout wear when she went shopping in King’s Road, Chelsea in London last week. She looked chic in her all-black outfit for the solo retail therapy trip.

Kate sported a laid back look while indulging in some shopping. She wore black yoga leggings paired with a leather and suede gilet by Alice Temperley. The mother-of-two teamed her look with a black honeycomb roll neck jumper by the same designer. Kate completed her look in a pair of pink and white trainers by Asics.

The 34-year-old royal was pictured emerging out of a fitness wear shop Lululemon. She carried a gray leather handbag by Tod’s Bauletto and also a red and white carrier. She accessorized her casual ensemble with a pair of Annoushka pearl drop earrings.

According to Hello, Kate was in Lululemon mostly to pick up some athletic gear for her upcoming trip to Scotland Wednesday. The Canadian brand Lululemon is a haven for yoga enthusiasts. It has become a hit with celebrities like Michelle Obama and Rosie Hungtington-Whiteley are among those that have been spotted wearing their clothing.

Meanwhile, the sporty Kate reportedly stayed fit during her college days by participating in rowing, swimming, yoga and running. The duchess will participate in Judy Murray’s tennis workshop -- Tennis On The Road at Craigmount High School in Edinburgh Wednesday. Andy Murray’s mother’s foundation aims to deliver starter tennis to both adults and children, encouraging them to get active and play the sport.

After the tennis coaching workshop, Kate will then visit two of her patronages — Place2Be and The Art Room — in Scotland. The British royal will visit St Catherine’s Primary School to see how Place2B’s work in Scotland is improving the emotional wellbeing of pupils, parents, families and school staff. She will also visit the Wester Hailes Education Centre that houses The Art Room’s first studio in Scotland.