Prince William and Catherine, the Princess of Wales, have made their first joint public engagement since Kate finished her chemotherapy treatment last month.

The pair met the bereaved parents of victims of a stabbing rampage in the seaside town of Southport on Thursday.

William and Kate spent 90 minutes meeting privately with the families of Bebe King, 6, Elsie Dot Stancombe, 7, and Alice Dasilva Aguiar, 9, who were killed at the Taylor Swift-themed dance class on July 29.

They also met with the teacher of the class and emergency workers.

Ten other people, including two adults and eight young girls, were wounded in the attack. 17-year-old Axel Rudakubana was arrested and has been charged with three counts of murder and 10 counts of attempted murder, according to CBS News partner BBC News. He is set to appear in court at the end of October.

King Charles III and Taylor Swift have previously met with the families of the victims.

In September, Kate said she had completed chemotherapy treatment she was receiving for an unspecified type of cancer doctors discovered after an abdominal surgery in January.

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