Kate can't get enough of her favourite pearl earrings

By Laura Sutcliffe

The Duchess of Cambridge stepped out in style at Olympic Park on Thursday (Mar. 22), wowing the crowds in a cream-coloured Goat coat that costs $1100, a $90 patterned top by high street brand Hobbs, black skinny pants, a simple clutch and black pumps. The icing on the pregnant royal's look was a pair of stunning drop earrings by Annoushka, which caught the eyes of jewelry fans and ring in at $2200. The pregnant royal wore her hair in her trademark waves, revealing her pearls when she tucked it behind her ear.

Kate Middleton in a cream coatKate has worn her favourite pearl earrings many times

The earrings are a stunning addition to any jewellery box – the pearls are suspended on small hooped bar which are set with 0.16 ct diamond and black rhodium detailing. This isn't the first time the wife of Prince William has worn the sumptuous gems – she also wore them in January when she paid a visit to the Great Ormond Street Hospital in London – when she wore a $400 red coat by high street store Boden.

Kate Middleton's Pearl earrings up closeDuchess Kate's earrings are by high-end jewellery brand Annoushka

She even wore them with a tracksuit at the start of the year! Kate swapped her heels for trainers as she stepped out for her sporty afternoon engagement in South-West London on 17 January to see the work of the Wimbledon Junior Tennis Initiative at Bond Primary School in Mitcham. The 36-year-old – wrapped up warm in a white track jacket from Clarice, priced at $235 and her super-glam earrings.

MORE: Duchess Kate shows off baby bump in $90 Hobbs top

Thursday's appearance was the very last official engagement the mother of Prince George, four, and Princess Charlotte, two, undertook before her maternity leave starts. Although she will not undertake any more duties until the autumn, there are some traditional royal events Kate is likely to attend, which include the Trooping the Colour parade in June to celebrate the Queen's birthday, and one of the Buckingham Palace summer garden parties.

READ: Kate nails pastel trend in mint green coat

She is also expected to attend her brother-in-law Prince Harry's wedding to Meghan Markle in May, which will take place just weeks after she gives birth.

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