Your sister's other half has been part of the family gatherings for years now, but the Christmas card can still end up feeling like it's really for your sister with his name tacked on. Here's how to make it feel like it's genuinely for both of them.

Warm, funny and simple Christmas messages for a sister and brother-in-law, whatever your relationship with him is like.

Heartfelt Christmas Messages

• Happy Christmas to my wonderful sister and the brother-in-law who's become just as much a part of the family. Love you both.
• Wishing you both a magical Christmas — so grateful to have you both in my life.
• Merry Christmas to my sister and the man who makes her so happy. You're both so loved.
• Happy Christmas to you both — thank you for all the love and laughter you bring every year.

Warm and Simple

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

Funny Christmas Messages

For the sibling relationship that runs on banter.

• Happy Christmas to my sister and the poor soul who married into this family. Welcome to the chaos.
• Merry Christmas! Thanks for putting up with her — and us — another year.
• Happy Christmas to you both — may the mulled wine be strong and the family arguments be brief.

Short and Simple

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

Tips for Their Christmas Card

Address them as a pair, not just your sister. A card that reads like it's for her alone, with his name as an afterthought, can feel a bit off after years of him being part of the family.

A shared joke goes a long way. If you've got an ongoing bit of banter with your brother-in-law, Christmas is a great excuse to use it.

Keep it warm even if you're not super close. You don't need to force intimacy that isn't there — genuine warmth reads better than forced closeness.

Find Their Christmas Card

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