Your son's other half joined the family a while back now, but writing to the two of them together on one card can still feel oddly tricky — too formal and it feels distant, too jokey and it might not land yet if you're still getting to know her.

Here are warm, funny and simple messages for a son and daughter-in-law together, whatever stage you're at with them.

Heartfelt Christmas Messages

For when you want them to know they're both properly part of the family.

• Happy Christmas to a wonderful son and the daughter-in-law who's become just as precious to us. Love you both.
• Wishing you both a magical Christmas. We're so grateful to have you both in our lives.
• Merry Christmas to my son and the woman who makes him so happy. You're both so loved.
• Happy Christmas to you both — watching your little family grow has been the greatest joy.
• Wishing you a Christmas filled with love, laughter and everything you both deserve.

Warm and Simple

• Happy Christmas to you both — hope it's a wonderful one.
• Wishing you both a very merry Christmas, with love.
• Merry Christmas! Sending our love to you both this year.

Funny Christmas Messages

For the family where a laugh goes further than a soppy line.

• Happy Christmas to my son and the brave woman who agreed to marry into this family.
• Merry Christmas! Thanks for putting up with our questionable family traditions another year.
• Happy Christmas to you both — may your gifts be good and your in-laws (that's us) be tolerable.

Short and Simple

• Happy Christmas to you both — love you.
• Wishing you a wonderful Christmas together.
• Merry Christmas, with all our love.

Tips for Their Christmas Card

Include both names, always. It sounds obvious, but a card that only addresses your son can quietly sting — make sure she's named just as warmly.

Mention something specific to them as a couple. A line about a shared memory or something they did this year makes the card feel genuinely theirs.

Match the relationship, not just the occasion. If you're still building a relationship with your daughter-in-law, keep it warm but not overly familiar — it'll grow naturally over time.

Find Their Christmas Card

Our Christmas cards for son and daughter-in-law are printed on 300gsm smooth matt card and posted across the UK, personalised with both their names.