Your baby girl’s first birthday isn’t just a milestone for her, it’s a huge one for you, too.
You’ve spent the past twelve months learning, loving, and surviving life with your little one. And now you get to mark the occasion with something joyful and fun: her very first birthday party.
She may giggle at the balloons, try to eat the wrapping paper, or light up when everyone sings, but the real joy of a baby girl first birthday is yours. You’ve made it through an entire year of firsts, late nights, and endless love. That’s worth celebrating!
Planning your little girl’s first birthday can feel like a big task, especially with so many adorable options floating around. From picking the perfect baby girl first birthday outfit to choosing decorations and a cake, it’s easy to get caught up in all the details.
That’s where having a theme comes in handy. A good first birthday theme ties everything together and makes your planning process a whole lot easier (and more fun!).
Whether you’re into soft florals, magical fairies, or bright berry colors, there’s a first birthday theme for girls that will fit your vision perfectly.
In this post, I’ve gathered beautiful, creative, and totally doable first birthday ideas to help you plan a celebration that’s as sweet and special as your little girl. Let’s make her first birthday one to remember, for you, and for all those adorable photos you’ll cherish forever.
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Best Themes for Your Baby Girl’s First Birthday
Girls Just Wanna Be One
This sweet and stylish theme is perfect for the girly girl who’s ready to celebrate in soft pinks, bows, and all things pretty.
Start with a Girls Just Wanna Be One backdrop, and decorate with pastel pink and white balloon garlands, oversized ribbon bows, and pearl accents.
For desserts, think bow-shaped cookies, a pink ruffled cake with pearl details, and cupcakes topped with tiny fondant bows.
Dress your baby in a frilly pink outfit or a tutu with a matching bow headband.
For favors, send guests home with girly presents like mini bow clips, pearl bracelets, or pink sunglasses.
This theme is feminine, photo-ready, and full of charm, a beautiful way to mark your baby girl’s first year in style.
Berry First Birthday
If your baby girl’s birthday falls during strawberry season, a Berry First Birthday is a sweet and colorful theme that’s easy to pull off!
Start with a simple “Berry First Birthday” banner, strawberry-themed invites, and red, pink, and green decorations. Think strawberry balloons, gingham tablecloths, and berry cutouts for a playful touch.
Dress your baby in a strawberry outfit, and style the dessert table with strawberry cupcakes, berry cookies, mini cheesecakes, and pink lemonade. Crates of fresh strawberries double as décor and snacks.
Set up a fun Berry Patch play area or a strawberry coloring station for the little ones.
For favors, offer strawberry-themed gift boxes with sweets or other themed favors.
This theme is cute, affordable, and perfect for a baby girl first birthday that feels fresh, fun, and photo-ready.
One-derland Tea Party
A One-derland birthday is a sweet, whimsical theme inspired by vintage tea parties and soft floral touches.
Think pastel colors, touches of gold, garden greenery, and antique-inspired details that make everything feel dreamy and delicate.
Add classic Alice in Wonderland elements like mini top hats, golden keys, pocket watches, teapots, heart-shaped cards, and whimsical “Eat Me” and “Drink Me” signs for an extra whimsical touch.
Set up a long tea party table with mismatched teacups and candles. Offer tea-themed treats like finger sandwiches and mini desserts like macarons, cookies, and cupcakes.
Whether you’re going full Wonderland or keeping it soft and vintage, this One-derland idea is a beautiful way to celebrate your little one’s magical first year.
SomeBunny is One
Soft, sweet, and full of charm — the Somebunny Is One theme is perfect for a spring or garden-style baby girl first birthday.
Decorate with pastel pinks, florals, a sign with white bunny ears, and soft touches like tulle bows and tiny carrots.
Add bunny-themed gift boxes, cupcakes with bunny ears, and a beautiful two-tier carrot cake topped with an adorable bunny figurine or a fun topper. For an extra cute treat, serve bunny-shaped cake pops alongside bunny cookies and pink lemonade.
For a fun touch, hand out bunny ear headbands so every guest becomes part of the theme — it makes for the cutest photos!
This is one of the most gentle and whimsical first birthday themes for girls, and it works beautifully for both backyard parties and indoor celebrations.
One in a Melon
Bright, juicy, and full of summer vibes, a One in a Melon party is a fresh and playful theme that’s perfect for a baby girl first birthday during the warmer months.
Use the watermelon as your muse: think bold pinks, fresh greens, and a touch of black for contrast. Add fun pops of color through balloons, tableware, and floral arrangements.
The cake doesn’t have to be a literal watermelon, try a pink ombré cake with red and green accents or a tiered cake decorated with a themed topper. Serve refreshing drinks in cute bottles with striped straws, and go for light, fruity snacks like watermelon cubes, mini cupcakes, or citrus macarons.
Set up One in a Melon photo booth with themed props, and create favor bags with fruit-shaped stickers, bubbles, or summery treats.
You can even give your little one a matching melon-print baby girl first birthday outfit for the ultimate coordinated look, and finish the setup with a watermelon smash cake that ties in with the theme.
This sweet and simple theme is easy to adapt, budget-friendly, and guaranteed to leave everyone smiling.
One Groovy Baby
Set the stage for a trip back to the ’60s and ’70s with vibrant colors, funky patterns, and iconic symbols like peace signs and psychedelic swirls. This theme is all about good vibes and flower power — perfect for celebrating your little baby’s first birthday in style.
Decorate with retro daisies, muted rainbow colors, and a few iconic VW mini buses as props or cupcakes stand to complete the look.
Keep it fun and lighthearted with treats like smiley face cookies, pastel cupcakes, or a tie-dye cake topped with a peace sign.
Set up a colorfull photo booth with oversized glasses, flower crowns, and “Stay Groovy” signs for the ultimate throwback fun.
Dress your baby girl in a flower-power outfit — and get the whole family involved with retro groovy mama and daddy t-shirts. It’s a simple and fun way to bring the theme to life (and makes for the cutest family photos!).
This is one of the most colorful and creative first birthday themes for girls, full of joy, personality, and peace-and-love energy your little one will shine in.
First Bee-Day
Celebrate your little queen bee with a sweet-as-honey first birthday theme that’s cheerful, bright, and full of buzz!
Use a sunny color palette of yellow, white, and soft gold, and decorate with daisies, honeycomb patterns, and bee-themed balloons. A simple yellow cake with cute daisy accents and bee-themed cookies or honey-drizzled treats will make your dessert table pop.
Set up a “Bee Sweet” snack cart or lemonade station, and send guests home with mini jars of honey or bee-shaped cookies as favors.
This bright and joyful theme is easy to pull off and perfect for spring or summer celebrations, a buzzing favorite among first birthday themes for girls.
Donut Grow Up
If your little one is just too sweet to grow up, a Donut Grow Up party is the perfect first birthday theme. It’s colorful, fun, and filled with sprinkle-covered joy!
Start with a pastel palette, think pinks, blues, yellows, and a touch of gold. Set the scene with a Donut Grow Up balloon banner, sprinkle-themed backdrop, and colorful balloon garlands. Use donut-print plates, napkins, and party hats to bring the theme to life.
Dress your baby girl in a sprinkle or donut-themed outfit.
Go big with the dessert table! Stack donuts on cake stands, add donut cake pops in mason jars, and feature a birthday cake topped with mini donuts and colorful frosting. Set up a mini “Donut Bar” where guests can grab their favorite flavors or decorate their own.
Plan fun activities like decorating donuts, playing “Pin the Sprinkle on the Donut,” or a simple donut ring toss.
This theme is adorable, easy to customize, and totally photo-ready!
Want more sweet party inspo with donuts, ice cream, and all the sugar-filled fun? Check out my post on my daughter’s Two Sweet birthday celebration.
One-der the Sea
Make a splash with a magical One-der the Sea first birthday, full of mermaids, bubbles, and ocean fun.
Decorate in sea-inspired shades of aqua, lavender, and coral. Use seashells, starfish, and lots of mermaid accents. Hang a one-der the sea banner, sea creature lanterns, fishnet fabric, and balloon garlands to create an underwater feel.
Dress your baby in a sparkly mermaid outfit or a dress with seashell details.
For the dessert table, think ocean-colored cupcakes, shell-shaped cookies, and a mermaid cake with edible pearls.
Use a bubble machine to bring the underwater magic to life, it’s always a hit with little ones! Add fun touches like a mini “treasure dig” sensory bin or a seashell pinata.
This theme is bright, playful, and perfect for a first birthday that’s one-derfully unforgettable.
Unicorn First Birthday
A magical first birthday for a magical little girl! The unicorn theme is full of pastel rainbows, golden sparkles, and pure whimsy.
Think dreamy balloon arches in soft pinks, purples, and mint greens, a unicorn cake with a golden horn, and glittery decorations that make everything feel straight out of a fairytale.
You can dress your baby girl in a tutu dress with a matching unicorn headband and set up a unicorn-themed photo backdrop for those unforgettable first birthday pics.
Add in a touch of stardust (okay, glitter) and your unicorn party will feel like something straight from a dream.
Fairy First Birthday
If your little girl brings magic wherever she goes, a fairy-themed first birthday is the perfect way to celebrate her enchanting spirit.
Picture a woodland-inspired setting with twinkling lights, mossy greens, floral garlands, and tiny toadstools scattered across the party table.
Dress your baby girl in a soft pastel dress with delicate wings and a flower crown, and let her flutter through her special day like the sweet fairy she is.
Add touches like butterfly confetti, fairy wands, and storybook signs to complete the whimsical vibe.
It’s charming, gentle, and straight out of a fairy tale.
Your baby girl’s first birthday is such a meaningful milestone, and with the right theme, it becomes an unforgettable celebration. Whether you’re drawn to bright colors, soft florals, or a whimsical tea party, the perfect first birthday theme for girls sets the tone for a fun, stylish, and memory-filled day.
If you’re still shopping for your little one, don’t miss my roundup of the best toys for 1-year-olds, perfect for birthday gifts!
Don’t forget: it doesn’t need to be complicated. Choose one theme that fits your little one’s vibe (or yours!). Once you’ve picked a theme, follow my comprehensive Birthday Party Planner to bring it all together.
With love,
Shely
