(CNN) -
Happy birthday to Hazel and Phinnaeus Moder!
The young people's mother, actress Julia Roberts, celebrated her birthday on her verified Instagram account with a photo of when the twins were babies.
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"17 of the sweetest years in life," reads the caption, along with various emojis including 17 birthday cakes.
The twins are the children of Julia Roberts and Daniel Moder, whom he married in 2002.
They are also parents to 14-year-old Henry.
Julia Roberts