Special Occasions

Birthday Outfits for Boys & Girls

Celebrate their big day in classic Cecil & Lou style with birthday outfits for boys and girls. Shop smocked bubbles, birthday dresses, diaper sets, short sets, pajamas, rompers, and other coordinated styles featuring cakes, balloons, crowns, embroidery, appliqué, and playful party details.

From first birthdays to celebrations for bigger kids, find sweet outfits for birthday parties, milestone photos, family gatherings, and sibling coordination. Select styles may also offer personalization or monogramming for an extra-special birthday look.

  • Cecil & Lou girls' Pink Floral Birthday Print Knit Zipper Pajamas with pink trim and full-length zipper Additional view of Cecil & Lou girls' Pink Floral Birthday Print Knit Zipper Pajamas

    Pink Floral Birthday Print Knit Zipper Pajamas

    $32.00
    $32.00 $32.00
  • Cecil & Lou girls' Pink Floral Birthday Print Knit Pajamas with pink ruffle accents and matching pants

    Pink Floral Birthday Print Knit Pajamas

    $32.00
    $32.00 $32.00
  • Cecil & Lou girls' Pink Smocked Floral Birthday Print Bubble with cake-and-floral print and smocked ruffle collar

    Pink Smocked Floral Birthday Print Bubble

    $42.00
    $42.00 $42.00
  • Cecil & Lou girls' Pink Smocked Floral Birthday Print Dress with pastel bows, cakes, and white ruffle collar

    Pink Smocked Floral Birthday Print Dress

    $42.00
    $42.00 $42.00
  • Cecil & Lou boys' Blue Cupcake Print Long Romper with white Peter Pan collar and pastel cupcake print

    Blue Cupcake Print Long Romper

    $38.00
    $38.00 $38.00
  • Cecil & Lou boys' Blue Applique Cupcake Short Set with long-sleeve top and coordinating cupcake-print shorts

    Blue Applique Cupcake Short Set

    $43.00
    $43.00 $43.00
  • Cecil & Lou boys' Blue Cupcake Print Knit Zipper Pajamas with cupcake print and full-length zipper Additional view of Cecil & Lou boys' Blue Cupcake Print Knit Zipper Pajamas

    Blue Cupcake Print Knit Zipper Pajamas

    $32.00
    $32.00 $32.00
  • Cecil & Lou boys' Blue Cupcake Print Knit Pajamas with long-sleeve top, matching pants, and blue trim

    Blue Cupcake Print Knit Pajamas

    $32.00
    $32.00 $32.00
  • Birthday Cake And Candles Knit Zipper Pajamas1 Birthday Cake And Candles Knit Zipper Pajamas front

    Birthday Cake And Candles Knit Zipper Pajamas

    $32.00
    $32.00 $32.00
  • Birthday Cake And Candles Knit Pajamas1

    Birthday Cake And Candles Knit Pajamas

    $32.00
    $32.00 $32.00
  • Cecil & Lou girls' Birthday Cake and Candles Night Gown with pastel print, lace trim, pink bow, and ruffled hem

    Birthday Cake And Candles Night Gown

    $34.00
    $34.00 $34.00
  • Cecil & Lou girls' Smocked Birthday Cake and Candles Bubble with pastel birthday print and smocked ruffle collar

    Smocked Birthday Cake And Candles Bubble

    $42.00
    $42.00 $42.00
  • Cecil & Lou girls' Smocked Birthday Cake and Candles Dress with pastel birthday print, white ruffle collar, and long sleeves

    Smocked Birthday Cake And Candles Dress

    $42.00
    $42.00 $42.00
  • Pink Birthday Party Knit Dress

    Pink Knit Birthday Party Dress

    $39.00
    $39.00 $39.00
  • Pink Birthday Party Knit Diaper Set

    Pink Knit Birthday Party Diaper Set

    $39.00
    $39.00 $39.00
  • Blue Birthday Party Bamboo Knit Pajamas

    Blue Knit Birthday Party Pajamas

    $32.00
    $32.00 $32.00

Frequently asked questions

What are the best first birthday outfits?
Classic smocked birthday bubbles, embroidered shortalls, and sweet birthday dresses made from soft cotton are perfect for comfort and photos.
Do you sell first birthday dresses for girls?
Yes, shop smocked and embroidered birthday girl dresses with bows, cupcakes, or balloon designs. Many are monogram ready for personalization.
Do you offer first birthday outfits for boys?
Absolutely. We carry birthday boy outfits like shortalls, bubbles, and two piece sets with classic applique and smocked birthday designs.
Can I get a personalized or monogrammed birthday outfit?
Many of our baby birthday outfits and birthday dresses are monogram ready so you can add initials or a name for a custom gift.
Do you have matching sibling outfits for birthdays?
Yes, many of our first birthday collections include coordinating boy and girl styles so siblings can match for party photos.
What sizes do you carry for birthday outfits?
We stock sizes from 12M through 8, with select styles available up to 6 for big brother or sister matching.
When should I order for my child’s first birthday?
We recommend ordering early to ensure availability and allow time for personalization. Use filters to view in stock options for faster delivery.