Duchess Kate recycles royal blue Eponine dress for visit to South Yorkshire

Beautiful in blue!

The Duchess of Cambridge stepped out alongside husband Prince William on Wednesday in South Yorkshire, England, to help open McLaren Automotive's new Composites Technology Centre, as part of the duke's work as Patron of Centrepoint.

During their visit to Rotherham, the couple also spoke to STEM ambassadors from McLaren, a group which aims to inspire students to get involved in the science and engineering fields.

Duchess Kate and Prince William also paid a visit to Barnsley's Centrepoint UK's kitchen, where they joined in on the cooking with other of the hostel's volunteers.

For the occasion, the mom-of-three recycled a royal blue Eponine London coat dress, which she's worn on a number of occasions in the past. She accessorized the look with a pair of navy suede heels and a navy Smythson clutch.

Wednesday is a busy day for the royals, who later tonight will be reportedly celebrating Prince Charles' 70th birthday with a bash at Buckingham Palace. To see more on how the royals are marking the Duke of Wales' milestone birthday, watch the video above.

RELATED: See Kate's style transformation