40+ Wedding Wishes for Sisters To Write "Congratulations"

Tell your sib-turned-BFF just how much you love her.
Two sisters surrounded by roses, rings, flowers and a glass of champagne
Photo: Getty Images,Graphic: Falak Khoja
emily rumsey the knot editor
Emily Rumsey
emily rumsey the knot editor
Emily Rumsey
Assistant Commerce Updates Editor
  • Emily helps maintain and update e-commerce content for The Knot
  • Before joining The Knot Worldwide, Emily worked as a website editor and manager for The Paleo Diet®
  • Emily holds two bachelor's degrees in Journalism and International Affairs with a Chinese minor
Updated May 22, 2024

Coming up with a turn of phrase to encompass something as monumental as a wedding is no easy task—especially when it's your sister you're speaking to. There's a lot of life (and a lot of love) to incorporate into your wedding wishes for your sister.

If you're stumped on what to write in a wedding card for your sister, you've come to the right place. We spend a lot of time thinking about all the ways to be a good wedding guest, so we've got a back pocket full of sweet, sentimental and downright funny wedding quotes for sisters to help you put pen to paper. You can copy these messages exactly or use them as inspiration for a more personalized note reflecting on your relationship—from your first fight to your late-night heart-to-hearts.

Check out some of our favorites below, and remember: as long as your message comes from the heart, you can't go wrong.

Wedding Wishes for a Sister:

Congratulatory Wishes | Emotional Wishes | Example Letter | Example Poem | For a Sister and Her Spouse | From a Brother | From a Sister | For a Sister-in-Law

Congratulatory Wedding Wishes for Your Sister

Congratulatory wedding wishes for sister
Graphic: Falak Khoja

Celebrate your sister's big day with these joyful and heartfelt congratulatory wishes. Each message perfectly captures the excitement and happiness of her wedding day.

  • "Congratulations on your special day, sis! Wishing you a lifetime filled with love, laughter, and endless happiness."
  • "Cheers to a wonderful wedding day and an even more wonderful life together!"
  • "I'm so excited to celebrate this beautiful occasion with you and witness your love story unfold. Congratulations!"
  • "Here's to your happily ever after. May your love story be as magical and charming as your wedding today."
  • "To my beloved sister, congratulations on finding your forever! I couldn't be happier for you."

Emotional Wedding Wishes for Your Sister

Emotional wedding wishes for sister
Graphic: Falak Khoja

Express the depth of your emotions and the strength of your bond with these touching and heartfelt wishes for your sister's wedding card.

  • "Seeing you marry the love of your life fills my heart with so much joy. Wishing you endless happiness, dear sister."
  • "On your wedding day, I reflect on all our memories together and look forward to the beautiful ones you'll create with your new partner."
  • "As you embark on this new chapter, know that my love and support are always with you. May your wedding day be everything you've ever dreamed of and more."
  • "I hope your marriage is as wonderful and fulfilling as the special bond we share. I wish you all the best on your big day and beyond."
  • "For as long as I can remember, I've wanted to be just like you—kind, beautiful, smart, and funny. I'm overjoyed you've found someone who treasures you like I do."

Example Letter for Your Sister on Her Wedding Day

When a simple message isn't enough, a heartfelt letter can capture your feelings and memories in a more personal way. Fair warning: these emotional wedding wishes for your sister may bring you both to tears.

Dear Sister,

Today is the day you marry the love of your life, and my heart is bursting with pride and joy for you. From the moment we were little, I always knew you were destined for great things, and finding such a wonderful partner to celebrate life with is one of them. Watching you grow into the amazing person you are today has been one of the greatest privileges of my life.

Even during the times you annoyed me, I couldn't imagine life without you. It warms my heart to see your circle of unwavering support and love expand with your new spouse. As you enter this new chapter, I want you to know how deeply I love and support you. May your marriage be filled with laughter, love, and countless beautiful moments. Remember that I am always here for you, no matter what.

Congratulations on your wedding day! I'm overjoyed to stand by your side as you marry the love of your life, and I can't wait to see all the incredible things the future holds for you both.

With all my love,
Your Sibling

Example Poem for Your Sister on Her Wedding Day

A heartfelt poem is one exceptional way to convey your marriage wishes for your sister. Your thoughtful words will surely impress and deeply touch her.

To my sister, on your wedding day,

There is so much in my heart I could say.

From childhood days to this blessed hour,

You've grown into a woman of such grace and power.

May your marriage be filled with happiness,

With laughter, joy, and lasting togetherness.

Forever cherished, your love will grow,

Through every high and every low.

Congratulations, dear sister of mine,

Today, as a bride, your radiance shines.

Wishing you a life of love sincere,

Today, tomorrow and every coming year.

Wedding Wishes for a Sister and Her New Spouse

Wedding wishes for a sister and her new spouse
Graphic: Falak Khoja

These all-encompassing wedding card messages for your sister and her spouse will let them both know just how much you treasure having them in your life.

  • "Congratulations to the perfect couple! May your journey together be filled with love and happiness."
  • "To my dearest sister and her new spouse: Thank you for showing us all what a true partnership looks like."
  • "I couldn't be happier that you're officially bringing [future-in-law's name] into the family. I can't wait to stand by both of your sides as you say your 'I do''s."
  • "Happy wedding day, [couple's names]! May your love for each other continue to grow with each passing year."
  • "Congratulations—They're your problem now! Wishing you both lots of luck as you embark on this new chapter. May your marriage be filled with love, laughter, and endless joy!"

Wedding Wishes From a Brother to a Sister

Here are some wedding wishes from a brother to his sister that capture your unique and special bond.

  • "Sister, from the moment you were born, you've made my life a happier and brighter place. I couldn't be more proud to be your brother and wish you nothing but happiness and love in this next chapter."
  • "Being your protector has been one of the most important roles of my life. Today, I'm honored to share the torch with [future in-law's name]."
  • "Thanks for finally giving me the sibling I've always wanted in [future in-law's name]. (Just kidding, I love you!)"
  • "As your brother, I've seen you grow into an incredible person. Now, seeing you embark on this journey with someone special fills me with joy. Here's to a lifetime of happiness and harmony!"
  • "To my sister and her better half: May your love for each other grow stronger with each passing day. Sending you both warm wishes and endless blessings on your wedding day."
  • "Congratulations on your wedding day! You're the best big sister anyone could ask for. Here's to a partnership filled with understanding, patience, and unwavering support."
  • "Sis, I might not say it often, but today and always, I want you to know how much I love you. Seeing you so happy on your wedding day fills my heart with joy."
  • "From pretending to be pirates and princesses to witnessing your fairytale dream come true today, you've always been my favorite co-adventurer. Wishing you and your new partner a lifetime of thrilling experiences together."
  • "Dear sister, today is a testament to your strength and grace. May your marriage reflect the love and dedication you've always shown in everything you do."
  • "As your brother, I've witnessed your journey to this beautiful day. Here's to a lifetime of love and companionship with someone who cherishes you as much as I do. Congratulations, sis!"

Wedding Wishes From One Sister to Another

Whether you're writing wedding wishes for your little sister or older sister, these messages for your built-in BFF bring on all the warm fuzzies.

  • "Today is the day we (yes, we!) have been dreaming about. You're not just my sister—you're my best friend, and I can't imagine life without you. I'm so happy you've found your soulmate."
  • "From a little pest that always wanted to steal my clothes to my best friend, we've had quite the glow-up over the years. You make a beautiful bride!"
  • "May your marriage be as wonderful and fulfilling as our sisterhood. Wishing you both all the best."
  • "To my amazing big sister, who has always been my role model and source of strength: Seeing you so happy today fills my heart with joy."
  • "To my wonderful sister, on your special day: May your marriage be filled with as much love and happiness as you've brought into my life."
  • "To my favorite shadow: I've loved spending a lifetime by your side, and now it's someone else's turn. I couldn't be happier to call you my sister and friend."
  • "Dear sister, witnessing your love story unfold has been a privilege. Here's to a lifetime of happiness together."
  • "To my sister, confidant and forever friend: Today, as you say 'I do,' know that I'll always be here for you. May your marriage be filled with the same warmth and love you've always shown me."
  • "Dear sister, today you're marrying your perfect match—and while I'm a bit disappointed it's not the celebrity we dreamt of in our childhood, I'm thrilled to see you so happy."
  • "From sharing a room to sharing this special day, you've always been my closest companion. Wishing you and your partner a marriage filled with the same warmth, harmony, and cherished memories we've shared."

Wedding Wishes for a New Sister-in-Law

Wedding wishes for a new sister-in-law
Graphic: Falak Khoja

From funny wedding wishes for your sister-in-law to emotional ones, welcome her into the family with a personalized message that expresses your joy in officially gaining a new member.

  • "There's no one out there that could make my sibling happier than you! I'm so thrilled you guys found each other."
  • "All those years putting up with [sibling's name] nonsense as kids has finally paid off because they brought you into my life. I couldn't be more excited to officially count you as family!"
  • "Dear [future sister-in-law's name], We are so excited to have you in our lives, and I couldn't be happier for you and [sibling's name]. You're going to be the most beautiful bride!"
  • "Welcome to the family! I am so happy to finally get to call you my sister."
  • "To my new sister-in-law, may your marriage be filled with all the love and happiness in the world."
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