Whether you're a parent wearing a Christmas jumper, a nurse with a funny face card or a consultant in fancy dress, we want you to tweet your smiley selfies to @MoreSmilesApp using the hashtag #MoreSmilesChristmas
Don't forget to include a link to this website so people can find out more about the appeal www.moresmiles.org.uk
We love this photo of St Mary's family liason nurses Jo and Helen. You can send your photos in any time during the festive period. We can't wait to see them!