Dakota is currently dating the 42-year-old Coldplay frontman, who spent 13 years married to Gwyneth and shares his two children - 15-year-old daughter Apple and 13-year-old son Moses - with her.
However, Gwyneth, 47, and the "Yellow" rocker have remained close friends, with both families even holidaying together. And the "Avengers: Endgame" actress proved how close they really are as she shared a sweet post honouring Dakota on her special day.
"Happy 30th birthday to this absolute gem," she posted on Friday, October 4, alongside a black-and-white snap of the "Fifty Shades of Grey" actress with her dogs.
Dakota also got an Instagram wish that day from her film star mother Melanie Griffith, who posted a childhood photo of her daughter with the caption: "My Coqui... Happy Birthday my beautiful girl!"
"I am honored to be your Mama. So so proud of you! I love you with all of my heart!"