Kate Middleton reportedly had many "male admirers" before marrying Prince William and officially joining the royal family in 2011.

Back in June 2008, Middleton attended the Nelson Mandela 90th birthday concert in Hyde Park. At the time, Duchess Kate was only 26 years old and hadn't yet gotten engaged with Prince William. During the event, Middleton was photographed having a great time, smiling and chatting with several friends, many of whom were male, Daily Mail previously reported.

Prince William had not been able to join her as he was pursuing his military career aboard HMS Iron Duke in the Caribbean at the time.

Kate Middleton
Kate Middleton attended the 46664 Concert In Celebration Of Nelson Mandela's Life held at Hyde Park on June 27, 2008 in London, England. Getty Images/Gareth Cattermole

Among those who performed during the birthday concert were Sugababes, Amy Winehouse, Leona Lewis, Razorlight and Queen. Will Smith and his wife, Jada Pinkett-Smith, introduced the event.

This had not been the only time that Middleton was spotted partying that year. She also threw an '80s-themed Day-Glove Midnight roller disco party for charity at the Renaissance Rooms in Vauxhall, London.

Keeping up with the theme, Duchess Kate wore a green sequined top, bright yellow hotpants, pink leg warmers and black boots.

Nowadays, Middleton seems to have put her partying days behind her as she is now a duchess and a mother to Prince George, Princess Charlotte and Prince Louis. She and Prince William are often busy with royal engagements, the latest of which was the annual St. Patrick's Day parade.

The annual St. Patrick's Day parade is a tradition held to honor the Irish Guards. This year, 350 soldiers marched on the Parade Square at Cavalry Barracks on Sunday.

For the event, Middleton stunned in a forest green coat from Alexander Queen and a matching fascinator. She accessorized the gorgeous piece with a pair of green tourmaline and green amethyst Kiki McDonough earrings, a brooch that previously belonged to the Queen Mother.

The Duchess of Cambridge presented shamrocks to Officers and Warrant Officers, while her husband, who was dressed in full military uniform, saluted the marchers.

Prior to Middleton, the presentation of the shamrock was done by the Queen Mother for decades before she passed away. The tradition was later taken over by Princess Anne until 2012 when the duty fell to Duchess Kate, whose husband Prince William is the current royal colonel of the Irish Guards.