It's Christmas Kate! Duchess of Cambridge is festive in red Alexander McQueen dress for children's mental health centre party

She will have received scores of Christmas party invites but there's one festive engagement that The Duchess of Cambridge just couldn't turn down. 

Thirty-three-year-old Kate stepped out today in a red Alexander McQueen dress, that she has worn twice before, to attend the end-of-term celebrations at North London's Anna Freud Centre, a leading institution for youngsters with mental health issues.

At her first Yuletide gathering of the season, mother-of-two Kate was on hand to join family groups in creating a Christmas tree collage. 

The activity was part of an end-of-term reflection, with parents helping the children remember the positive progress they have made, both academically and in social relationships.

Kate also watched intently to a musical performance given by children, parents and staff to mark the end of term, allowing kids to demonstrate the skills they are developing in drumming workshops. 

Kensington Palace shared a short clip on their Twitter page of the Duchess merrily tapping along to the beat.