Madonna is one of the world's most famous pop stars but when it comes to her family life she's far more private – especially concerning her two eldest children.
But on Wednesday, the Holiday hitmaker took to Instagram to share some incredibly rare photos with her son Rocco, to mark his 21st birthday.
The proud parent posted a selection of pictures from over the years, from Rocco as a baby to recent images of him in present day.
VIDEO: Madonna shares rare video with all six children
In the caption, Madonna wrote: "Happy Birthday Rocco!! We Have Been on many Trips together around the World. But the Greatest journey I have taken with you is the one inside my [heart]. Love you to the moon and back. Forever and Always."
Fans were quick to comment on the post, with one writing: "The best mom!" while another wrote: "Wow where has the time gone?" A third added: "What an amazing mom he has as well!"
Madonna paid tribute to son Rocco on his 21st birthday
Madonna shares Rocco with ex-husband Guy Ritchie. She is also mom to daughter Lourdes Leon, 24, who she shares with ex-boyfriend Carlos Leon.
The award-winning singer later went on to adopt four children David, Mercy, and twins Esther and Stella from Malawi.
Madonna has homes around the world but primarily resides in Lisbon, Portugal, so that David can pursue his dreams of becoming a professional footballer.
She praised the teenager for his determination during an interview with Vogue, revealing that she could see herself in David the most.
Madonna shares Rocco with ex-husband Guy Ritchie
She said: "What he has more than anything is focus and determination. I'm pretty sure he got it from me. He's the one I have the most in common with. I feel like he gets me, he has more of my DNA than any of my other children so far."
The star's oldest daughter Lourdes, meanwhile, is following in her famous mum's footsteps as an aspiring dancer and recently graced the cover of Vogue to discuss growing up with a famous mom.
The award-winning singer with all six of her children
Madonna herself has previously spoken to the publication about her relationship with her daughter, admitting that she doesn't have the ambition she did due to her upbringing and social media, but that her daughter was "insanely talented".
She said: "I'm green with envy because she's incredible at everything she does – she's an incredible dancer, she's a great actress, she plays the piano beautifully, she's way better than me in the talent department. But she doesn't have the same drive."
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