Madonna Shares Lots of Birthday Love for 'Wild Child' Son Rocco as He Turns 16 -- Look How Much He's Grown!

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Madonna loves her birthday boy!

Her son Rocco turned 16 years old on Thursday, and the Rebel Heart singer shared lots of love on her Instagram to mark the occasion.

"Happy Birthday Wild Child!" the 57-year-old pop star captioned one pic that read, "Happy B-Day Rocco!"

WATCH: Madonna Shares Pic of Lourdes and Rocco Hugging for Family Night Out

In another pic, Madonna called her son "A true Warrior with a beautiful Heart."

Then, in a true proud mama moment, the singer shared a sweet throwback photo from when Rocco was just a toddler, writing, "Once my baby always my baby."

WATCH: Madonna and Son Rocco Reunite in New York City Ahead of Custody Hearing

He may always be her baby, but Rocco is growing up so fast!

The teenager has been living in London with his father, director Guy Ritchie, since last year amid a long custody battle over his living arrangements.

However, Rocco and his mom reunited in New York City in June, where they spent quality time with Madonna's oldest daughter, 19-year-old Lourdes.

Watch the video below for more on the family fun.