Your sister’s 12th birthday marks a special step into her pre-teen years. Celebrate her with simple, loving words that show your pride and joy.
Choose from playful, sweet, or emotional wishes. Let her know she’s cherished as she enters this exciting new chapter.
Happy 12th Birthday Wishes for Sister
Happy 12th Birthday! May your year sparkle with fun, friendship, and dreams coming true.
To my brilliant sister: Twelve looks amazing on you! Keep being smart, kind, and unstoppable.
Wishing you a year of cool adventures, new hobbies, and endless laughter.
Happy 12th! You’re not just my sister—you’re my forever friend.
Twelve means more confidence, more memories, and more sister fun. Let’s go!
Stay curious, stay brave, and keep shining. Happy Birthday!
Today is YOUR day! Enjoy every slice of cake and every happy moment.
Cheers to 12 years of laughter, secrets, and sister love. You’re the best!
Happy 12th! May your year be as bright and bold as your personality.
Keep growing, learning, and smiling. The world needs your light!
Twelve years of you = 12 years of joy. Love you, sis!
Here’s to a year of sleepovers, inside jokes, and making memories.
Heartwarming 12th Birthday Wishes for Sister
Happy 12th Birthday! Watching you grow into an awesome person makes me so proud.
Twelve years ago, you became my sister. Today, you’re my hero.
May your 12th year feel as cozy as your favorite hoodie. Love you loads!
You fill our home with music, art, and laughter. Have a magical year!
Happy Birthday! Never forget how loved and special you are.
Twelve candles, one wish: May your heart stay as generous as it is now.
You’re small but mighty—keep inspiring everyone around you.
Happy 12th! May your year be sprinkled with kindness and joy.
Twelve is the age of big dreams and fearless fun. Own it!
You’re growing up fast, but you’ll always be my little sis.
Happy Birthday! May your 12th year surprise you with happy moments.
Keep that smile glowing—it’s your superpower!
Emotional 12th Birthday Wishes for Sister
Happy 12th Birthday. It feels like yesterday we were building pillow forts.
Twelve years of sharing snacks, secrets, and sister hugs. Grateful for you.
Tears of pride today—you’re becoming someone extraordinary.
You’ll always be my baby sister, even when you’re taller than me.
Happy Birthday. Watching you grow is my greatest joy.
Twelve years of bedtime chats, school projects, and sister love.
Sis, you’ve taught me patience, loyalty, and how to laugh louder.
May your 12th year remind you that you’re loved beyond words.
I blinked, and my little sister turned 12. Slow down, time!
Happy Birthday. My heart swells seeing the person you’re becoming.
Twelve years of your jokes, art, and heart. Best gift ever.
You’re my forever friend. Keep growing, but stay my little sis.
12th Birthday Wishes for Sister from Parents
Happy 12th Birthday! You make every day brighter with your smile.
From Mom and Dad: Twelve suits you perfectly. Keep being YOU!
Sweet girl, you’re our pride. Make this year your best yet.
We’ll always support you—today, tomorrow, always. Happy 12th!
Happy Birthday! Our family is blessed because you’re in it.
Twelve years of loving you, guiding you, and learning from you.
Keep making us proud—not just by winning, but by trying.
Happy 12th! Remember, we’re here for every triumph and tear.
You’re the sunshine in our lives. Have an amazing year!
Twelve means new challenges. We know you’ll face them with grace.
Dear daughter, you’re our heart. Stay happy, healthy, and hopeful.
Happy Birthday! Let’s make your 12th year unforgettable.
12th Birthday Wishes for Sister from Brother
Happy 12th! Let’s game all night and eat pizza. Deal?
To my partner in chaos: Twelve years of fun. Here’s to more!
Sis, you’re my favorite troublemaker. Keep life exciting!
Happy Birthday! I’ll always beat you at basketball. Love you!
Twelve is cool, but you’re cooler. Go rock this year!
Thanks for being my sister—even when you borrow my stuff.
Need math help? Ask Dad. Want to prank Mom? I’m in!
Happy 12th! Stay brave, stay silly, and keep annoying me.
You’re tiny but fierce. Go show the world your spark!
Twelve years of sharing a bathroom? Worth it. Love you, sis!
Keep laughing loud and dreaming big. You’re awesome.
Happy Birthday! Never forget—I’ve got your back, always.
12th Birthday Wishes for Sister from Sister
Happy 12th! Let’s have a spa day—face masks, music, and cupcakes!
To my built-in bestie: Twelve looks fabulous on you.
Secrets, snacks, and sister talks—here’s to another year of us!
Happy Birthday! You’re my favorite person to laugh with.
Twelve means more TikToks, more memes, and more fun. Let’s go!
Thanks for being my partner in crime. Love you to the moon!
Happy 12th! Let’s make this year our most epic yet.
You’re not just my sister—you’re my role model. Shine on!
Keep being quirky, kind, and totally you. Happy Birthday!
Twelve years of sister hugs and heart-to-hearts. Best ever.
Happy Birthday! Life’s better because you’re my sis.
Let’s pinky promise to stay best friends forever. Deal?