Kate Middleton stepped out for an official engagement Monday morning with husband Prince William and brother-in-law Prince Harry, the day after she attended Queen Elizabeth II’s 90th birthday celebrations at Windsor Castle. And on both days, she reportedly set fashion trends with her dressing style.

On Monday, Middleton looked chic in a $150 blue-and-white patterned skirt from Banana Republic and a $416 cream white, full-sleeved top from Goat, according to Hello! magazine. The Duchess of Cambridge let her wavy hair loose and sported minimal makeup. She completed her attire with a pair of blue heels matching the skirt.

On Sunday, the 34-year-old duchess had mixed a $71 bright red coat with a $4,885 Dolce & Gabbana white lace dress, which has since been sold out online, according to Daily Mail.

Kate Middleton Prince William, Kate Middleton and Prince Harry arrive to attend the launch of Heads Together Campaign at Olympic Park in London, on May 16, 2016. Photo: Getty Images/Stuart C. Wilson

Middleton has been on official engagements lately amid pregnancy rumors, which Kensington Palace has not addressed.

Earlier this month, the Daily Star reported that Middleton wants to have a third baby and is hoping to conceive later this year. Middleton, who is reported to be travelling to Brazil for the Rio Olympics, does not want to risk the trip due to the prevalence of the Zika virus, the newspaper added.

“Catherine [Middleton] is obviously very concerned about the virus and won’t take any risks. All of her friends think that she wants to have three children. She had two siblings growing up and wants the same for George and Charlotte. We thought she might try later this year,” a source told the Daily Star.