Aww, how cute! Kourtney Kardashian celebrates her 37th birthday on Monday, April 18 and Kris Jenner wished her daughter a happy birthday with an adorable throwback baby photo.

The Kardashian/Jenner matriarch took to Instagram to post the family photo, which shows the always stylish Kris in a bright, yellow sundress and matching hat. She holds tiny Kourtney, who is swathed in a sea of pink and white frills. Proud papa Robert Kardashian stands with his girls, smiling broadly.

Kris's caption is loving and funny. She apologizes to her eldest child for the vintage outfit seen in the photo:

"Happy Birthday tomorrow beautiful @kourtneykardash !! I know it's crazy but I remember this pic like it was yesterday.. You have brought so much love, joy, and happiness into my life and I'm proud to be your Mom.. You teach all of us everyday what it means to be an amazing daughter, Mom, sister, friend, and a genuinely beautiful human being. Thank you for being such a bright light and an inspiration to me every day.. You are kind and patient and have the biggest heart and I love you more than you will ever know. You will always be my firstborn who captured my heart.... Oh, and I'm really sorry about this outfit I put you in....I love you, mommy."

Meanwhile, Kourtney is celebrating her big day in Iceland with sister Kim Kardashian West, Kanye West and friend Jonathan Cheban. Us Weekly reports they are shooting scenes for "Keeping Up With the Kardashians" and Kanye plans to shoot a music video while there.

Mrs. West posted a cute shot of Kanye trying to play with baby North, who isn't having any of it.

#AnnoyingDadAlert

A photo posted by Kim Kardashian West (@kimkardashian) on

As we wait to see what's really about to happen behind the scenes on Kourt's bday, we can get excited for the reality show's new episodes, airing in May. Kris posted a promo for the upcoming season, and to say we're excited is the ultimate understatement.

Only 4 Sundays left until season 12 of @kuwtk!!!! Starts May 1 at 9/8c on E! #KUWTK #season12

A photo posted by Kris Jenner (@krisjenner) on

Happy birthday, Kourtney!