NEW YORK, Feb. 22 (UPI) -- Madonna is missing her son, Rocco Ritchie, on Instagram, posting a photo of him Monday.
The photo of the 15-year-old was posted with the message, "I miss this boy so full of life so full of love! I hope we see that Leo Sun soon. The light is blinding!"
"Leo Sun" refers to his Zodiac sign.
Madonna, 57, is fighting to regain custody of Rocco, who refused to return home in January from a visit to his father, Guy Ritchie, in London.
On Wednesday, Madonna posted a photo of Rocco as a baby hanging onto her back.