Kate In Gray Orla Kiely Dress

Kate, Charles and Camilla visit art gallery.

Britain's Catherine, Duchess of Cambridge, arrives to visit the Prince's Foundation for Children and the Arts at the Dulwich Gallery in South London on March 15, 2012. The Duchess visited the Dulwich after playing hockey with members of the British Olympic team at the Riverside Arena. AFP PHOTO / MIGUEL MEDINA (Photo credit should read MIGUEL MEDINA/AFP/Getty Images) — Britain’s Catherine, Duchess of Cambridge, arrives to visit the Prince’s Foundation for Children and the Arts at the Dulwich Gallery in South London on March 15, 2012. (Miguel Medina / AFP-Getty Images)

Kate Middleton sure is getting to see a lot of her in-laws these days.

This afternoon she joined her father-in-law, Charles, at a south London gallery dedicated to art therapy for children. The pair were greeted by hundreds of cheering schoolchildren waving Union flags when they arrived in the bright sunshine at Dulwich Picture Gallery with the Duchess of Cornwall.

It was the first time Kate had joined Charles on a visit to one of his charities.

They chose to see the work of the Prince’s Foundation for Children and the Arts at Dulwich because of their mutual interest in “art, art therapy and children,” a Clarence House spokesman said.

Kate wore a dark grey Orla Kiely dress with black pattern detail on the top, and a pleated skirt. She wore a coat dress by the same designer on a previous engagement earlier this year. The outfit was completed with black high heels.