The 36-year-old "Almost Famous" star shared a video on Instagram that first pans across cupcakes and a "Happy Birthday" banner and then shows her cuddling to her mom and planting a kiss on her cheek, reported People magazine.
She captioned the video with an original poem about her mother's life.
"On this day in the clouds I'm sure// A man had a plan for the twenty first// He took a sweet soul and said its time my dear// You must go back down to share your cheer// Your beauty will please// Your laughter will spread...," the first few lines of poem read.
The poem ended with Hudson sharing the idea of life that Hawn had taught her.
"...Live fearlessly facing the sun// Bath gently under the moon// Love all around you// Laugh till you cry// Cry till you laugh// We live till we die// She says live with all your might!," the poem concluded.