Maralee Nichols and Tristan Thompson's son Theo melted hearts on St. Patrick's Day.

On Thursday, March 17, Nichols welcomed the celebration with an Instagram Story picture of Theo.

In the sweet image, the adorable toddler sported a green onesie with "Happy St. Patrick's" written on it.

Nichols previously revealed that the toddler's name translates to "Gift From God."

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The fitness model called the three-months-old her angel baby as she believed she could not conceive.

Theo bears his father's surname, but the NBA player is absent from his birth certificate.

Thompson is not listed on the document as he was contesting Nichols' paternity claims at the time.

A spokesperson for the model revealed that the NBA player "has done nothing to support their son."

Lawyer Morghan Richardson posited that Thompson owes his third baby mama $34,000 monthly.

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