Eight months after announcing her cancer diagnosis, Kate, Princess of Wales, made her first public appearance on Thursday.

Kate, 42, accompanied her husband Prince William in Southport, England, the scene of a knife attack at a local dance school in July that left three children dead and nine others injured.

Kate and William met with the fire department, ambulance, air ambulance and police at the Southport Community Center, according to Kensington Palace.

They also met with mental health professionals working to support community members following the attack, which occurred at a Taylor Swift-themed event.

A 17-year-old boy was arrested after the attack on suspicion of murder and attempted murder, police said at the time. The incident was not classified as terrorist and no other suspects were being sought, police said. A motive is unclear, police added.

Kate’s public appearance marked a milestone in her recovery from her cancer diagnosis, details of which were not revealed. The mother of three announced in March that she had been diagnosed with cancer and was undergoing “preventive chemotherapy.”

Kate said in a video message in September that she had completed chemotherapy and was now focusing on remaining “cancer-free” and gradually returning to work.

“As summer comes to an end, I can’t tell you what a relief it is to have finally completed my chemotherapy treatment,” Kate said in the message shared by the palace. “The last nine months have been incredibly hard for us as a family. Life as you know it can change in an instant and we had to find a way to navigate the stormy waters and the unknown road.”

Earlier this month, Kate was photographed at Windsor Castle hugging a teenager battling cancer as she continued her return to work.

Editor’s note: This story has been updated to reflect the death toll in the July stabbing attack in Southport, England, as three children.