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Britain's Catherine, Duchess of Cambridge smiles as she attends a ceremonial welcome ceremony at the start of a state visit of Singapore's President Tony Tan Keng Yam at Horse Guards Parade in central London on October 21, 2014. Singapore's President Tony Tan began the first full day of engagements in the first state visit by a Singaporean president to Britain. AFP PHOTO / POOL / TOBY MELVILLE Image Credit: AFP

The Duchess of Cambridge has resumed her royal duties after spending more than two months out of the public eye while suffering from acute morning sickness.

Kate and her husband Prince William welcomed the president of Singapore to London at the start of a state visit on Tuesday. She greeted President Tony Tan and his wife Mary at the Royal Garden Hotel and told them “I’ve been looking forward to getting out of the house, that’s for sure.”

Kate is 12 weeks pregnant and has been receiving treatment for severe morning sickness, which also plagued her first pregnancy.

She plans to attend the Wildlife Photographer of the Year awards gala on Tuesday night at the National History Museum.

Tan was also being welcomed by Queen Elizabeth II and her husband, Prince Philip.