65 "Happy Mother’s Day, Mother-in-Law!" Messages to Show You Care

Wondering how to tell your mother-in-law just how much you love her? Mother's Day is the perfect opportunity to show your heartfelt appreciation. While finding an appropriate card is pretty straightforward, figuring out how to say "Happy Mother's Day, mother-in-law" in a sentimental way can be a little trickier. Luckily, we've compiled a list of sweet, funny and inspiring examples that you can use to spark some wording ideas. Whether you get along with your mother-in-law like two peas in a pod or are still getting to know each other, these mother-in-law Mother's Day messages below will help you flex your wordsmithing skills. Grab a pen and let's get started.

FYI: A little reminder of your gratitude and affection can go a long way, and we think a thoughtful Mother's Day card is one way to show it. Grab one that'll wow your MIL on The Knot Invitations, so you can take advantage of our favorite stationery hack. Pick a digital save-the-date card, which is completely free, to make a custom Mother's Day card for your mother-in-law. You can start from scratch by uploading your own design or you can use one of the dozens of premade, top-notch styles as a template.

Our favorite mother's day mother-in-law wishes: Sweet | Funny | Cute | Poems | From Daughter-in-Law | From Son-in-Law | For Future Mother-in-Law

Plus: What to Write in a Mother-in-Law Mother's Day Card

Sweet Mother-in-Law Mother's Day Wishes

If you always end up dropping the "in-law" part of her title or have cute nicknames for your mother-in-law, you have a very special bond to celebrate on Mother's Day. Keep reading to find a sweet message for your mother-in-law that'll let her know how much you love her.

• On a day we celebrate the most amazing moms, I'm thrilled to call you one of mine.
• Of course, you'll say that any day is great as long as it's spent with your kids, but this one is all yours. Happy Mother's Day!
• No one deserves a better Mother's Day than you do. We hope it's wonderful!
• Thank you for raising my best friend—I'll always be grateful for the person you helped them become.
• Happy Mother's Day. We're so thankful for you and all you do, today and every day.
• From the first day we were introduced, I knew we would get along. Your kindness and warmth made me feel like family.
• Thank you for being the most incredible MIL that anyone could ever ask for.
• We wanted to let you know just how blessed we feel to have you in our lives. Have the best Mother's Day ever!
• It's hard to put into words just how much we adore you. Sending all our love to you on Mother's Day.
• You have the biggest heart and are always caring for others—so, let us look after you this Mother's Day.
• Your strength, support and caring spirit make me smile everyday. Love you, and Happy Mother's Day!

Funny Mother-in-Law Mother's Day Wishes

Do you and your mom-in-law have a similar sense of humor? If you're lucky enough to share a few inside jokes with her, these funny mother-in-law quotes and examples will make her chuckle. Who knows? They may be just the thing to cement your status as her favorite child-in-law. (Just kidding, you probably already are.)

• "It's not easy being a mother. If it were easy, fathers would do it." —The Golden Girls
• Instead of brunch and mimosas for your special day, we leveled up to guac and margs. Cheers to the very best mother-in-law, love you!
• Happy Mother's Day, mom-in-law. Nope, that sounds weird. HMD, Mom!
• To my reality TV-obsessed MIL, you give Kris Jenner energy on the regular.
• "Mothers are all slightly insane." —J.D. Salinger, The Catcher in the Rye
• I really wanted to impress you with my wit and literary skills, but all I've got is letters. HMD, MIL!
• How do you put up with me? There's no way I'll be half as nice to my kiddo's future forever love. Happy Mother's Day to a one-of-a-kind mama.
• I know you probably want to spend this day with your actual kids, but thanks for letting me hang.
• May your Mother's Day be filled with love, peace and lots of bubbly.
• Thanks for passing on your problem child to me—now I know why you were so happy to meet me! Just kidding (kinda), have a great Mother's Day.
• Happy Mother's Day to a mother-in-law I actually want to spend time with.
• Mother's Day only comes around once a year, so make sure you MIL-k it for all it's worth!
• Thank you for always answering the phone when I want to ask why [partner's name] acts the way [he/she/they] do. It's truly eye-opening. HMD!
• Mothers-in-law are like the extra spice in life. Sometimes a little too much, but always necessary. —Anonymous

Photo: Megan Wynn Photography

Cute Mother-in-Law Mother's Day Wishes

"Happy Mother's Day to my mother-in-law" isn't going to cut it. Instead, let a nice quote do the talking for you. There are so many meaningful Mother's Day sayings out there from historical figures, literature, film and more. Check out these great mother-in-law Mother's Day quotes below.

• "A mother gives you a life, a mother-in-law gives you her life." —Amit Kalantri
• "God could not be everywhere, and therefore he made mothers." —Rudyard Kipling
• "Once blessed with a wonderful mother; twice blessed with my mother-in-law." —Danielle Carson
• "The mother-in-law is the center of a family." —Les Dawson
• "She taught me what's important and what isn't. And I've never forgotten. And that's what mothers do, I say." —Steven Herrick, A Place Like This
• "All that I am, or hope to be, I owe to my angel mother." —Abraham Lincoln
• "My mother-in-law you may be, but a friend in you I'll always see." —Unknown
• "Having a great mother-in-law is like winning the lottery." —Unknown

Mother-in-Law Poems for Mother's Day

If you really want to pull out all the stops this year, how about writing her a mother-in-law poem for Mother's Day? It's a really thoughtful way to express your gratitude, and it doesn't have to be overly complicated. We've composed two examples of Mother's Day poems for a MIL to help you get started.

A haiku is a three-line poem with five syllables in the first line, seven in the second and five in the third. Check out our sample below:

You bring so much cheer,
With wisdom and laughter, too
We're lucky you're here!

Your love lights the way,
Making life brighter each day
Happy Mother's Day!

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FOR YOU

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Or, try your hand at a four-line poem with an AABB rhyme scheme. These are easily adaptable to fit whatever rhyme feels right.

Mother's Day comes just once a year,
And we're so lucky to have you here.
To a mother-in-law as special as you,
We want to say thanks for all that you do.
Today is our chance to send love your way,
And we hope you feel cherished this Mother's Day.

Photo by: Anna Jung-Hwa Photography

Happy Mother's Day Mother-in-Law Quotes From Daughter-in-Law

Whether you're just starting to get to know your mother-in-law better (now that you're officially part of the fam) or have been getting close for years, you'll definitely grab her attention with these gracious and loving inscriptions. See what quotes and examples we've compiled below.

• "Thank you for all that you do for me/For raising the man of my dreams/For always believing in me" —"Mother-in-Law" by Anna Richey
• I must have done something right to land [partner's name] and you. Hope that never changes.
• My mom is a hard act to follow, but you've truly become a second one to me. Happy Mother's Day!
• "When you have a wonderful mother-in-law who supports you, understand that you are lucky." —Unknown
• Don't know how I ever could have worried about joining this family—you've made me feel at home from the get-go. HMD to an iconic matriarch!
• I'm one lucky daughter to have you as my MIL. I love you!
• "Conscience is a mother-in-law whose visit never ends." —H.L. Mencken
• I'll let [partner's name] toast you first, but then it's my turn. Have a terrific time today, mother-in-law.
• You've always been a mom to me. Thank you for welcoming me into the family!
• [Partner's name] is so amazing because of you—so thank you, and Happy Mother's Day!

Happy Mother's Day Messages From Son-in-Law

Writing a long and sentimental note is one way to thank your mother-in-law, but you can also do a simple, short message. Add a compliment or two to your card, and you've got the perfect Mother's Day message to your mother-in-law. If you're a son-in-law thinking of what you should say, check out these ideas for inspo.

• I lucked out with you as a mother-in-law and I don't say that often enough. Happy Mother's Day, Mom. Enjoy it!
• Your [son/daughter/child] is everything and more to me—thank you for your role in raising them.
• I know you'd be happy to go out for the day, but how about dinner here? I've already planned the menu and [partner's name] helped make it perfect.
• My mom made great pancakes while we were growing up, but to be honest, I like yours better (don't tell her I said that). Happy Mother's Day to the mom who keeps me well-fed.
• Thank you for all you've done and continue to do. You're an incredible mother and I'm so glad to call you family. Happy Mother's Day!
• [Partner's name] is a phenomenal parent and clearly they learned from the best. Happy Mother's Day to you from us and your equally grateful grandkids!
• You love helping out others, but Mother's Day is all about you. Today, we're at your service to make it the best!

Photo: Madeleine Collins Photography

Happy Mother's Day Messages for a Future Mother-in-Law

To further develop your relationship with your spouse-to-be's mom, we suggest involving your future mother-in-law in wedding planning since it'll be a good opportunity to spend time with each other. As you're going through this process, important holidays like Mother's Day may come along. For your future MIL's Mother's Day card, consider writing messages about wedding planning together, getting to know each other better or being excited to join the family.

• After wedding planning together for the past [time period], I've realized that a mother-in-law like you is hard to find. Thank you for helping me during this crazy time, and Happy Mother's Day!
• I'm honored to have gotten to know you more these last few months. You're an amazing mom. Happy Mother's Day!
• Great moms aren't a guarantee, but [partner's name] and I got lucky. Treat yourself today!
• I hope your Mother's Day is one for the books. I scheduled you some time at the spa to commemorate the occasion!
• Excited to celebrate you today—and many more Mother's Days to come!
• You've been a major help with all of our wedding plans, so take today off—seriously. Happy Mother's Day, future MIL!
• Next year, you'll officially be my mother-in-law, and I honestly can't wait!
• I'll always remember how excited you were when [partner's name] and I got engaged. It meant a lot then, and it still does today. Happy Mother's Day.
• The future looks bright—having you as my MIL is going to be awesome!
• Sending you hugs and kisses on this Mother's Day and all those yet to come.
• To my mother-in-law in the making, I hope this Mother's Day brings all the lovely things you deserve.
• Is it too soon to call you mom? So excited to be joining the family.
• Happy Mother's Day, future mom-in-law! Hope you have a great one.

What to Write in a Mother-in-Law Mother's Day Card

Once you've found the perfect gift for your mother-in-law, it's time to write "Happy Mother's Day" on a card. (Psst: Don't forget to get your card from The Knot Invitations.) But where do you start with saying Happy Mother's Day to your mother-in-law? First, determine if she likes funny notes, or if sweet and sentimental is more her love language. Your gut instinct is usually right on target, but if you're still in doubt, you can always reread a card she gave you on a special day (like your wedding day or birthday, perhaps) for insight.

If she waxed poetic on how you've made her child the happiest in the world, feel free to do the same with a passage that celebrates her prowess as a mama who did such a great job raising your other half. Maybe she penned a message about the future, in which case you can return the favor with Mother's Day well-wishes that speak of all the good times yet to come. Finally, if she praised you for putting up with her kiddo's quirks, you've got the green light to take a more humorous approach by referencing one of your partner's funny habits in your prose.

Whether you decide to go with one of the best mother-in-law quotes for the Mother's Day card, a funny saying or an original, heartfelt message, it'll strike the right tone as long as you're sincere.

Additional reporting by Chapelle Johnson.