The Princess of Wales, Kate Middleton, celebrated World Mental Health Day in England on October 10, and she wore black dress pants that resemble the Spanx Wide-Leg Perfect Pant. Read my review on the comfortable Spanx pants, which Oprah Winfrey approves of, that have become my go-to work pants

Kate Middleton's Dramatic 10-Year Fashion Transformation - Fame10

Royal Style Watch: From Kate Middleton's skinny jeans to Zara Tindall's sassy heels

Kate Middleton style: The duchess's favourite high-street brands

KATE MIDDLETON'S STYLE: HOW TO COPY THE DUCHESS OF CAMBRIDGE'S MOST FASHIONABLE LOOKS – GLS Collective

Kate Middleton's Sleek Black Trousers Look Like My Go-To Work Pants

Kate Middleton in Cream Blazer & Black Trousers at Baby Bank

Kate Middleton Suits Up in Reiss Blazer & Flats for Baby Bank Visit

Kate Middleton cuts a corporate figure as she wears suits for her six most recent engagements - amid reports she and William are looking for a CEO

Kate Middleton's Sleek Black Trousers Look Like My Go-To Work Pants