Al Pacino allegedly asked his girlfriend, Noor Alfallah, 29, for a paternity test when she shared that she was pregnant with his fourth child, according to a new report.

The legendary actor, 83, allegedly didn't believe the baby was his at first, TMZ reported. 

A representative for Pacino told Fox News Digital "we are not making comment" on Thursday.

TMZ reported that Alfallah — who is now eight months pregnant — willingly took the paternity test, which ruled that Pacino is indeed the father. He reportedly was not aware she was pregnant until two months ago and was "shocked" after learning the news, a source told the outlet. 

AL PACINO SURPASSES PAL ROBERT DE NIRO, 79, AS OLDEST HOLLYWOOD DAD, EXPECTING CHILD AT 83

Al Pacino, Noor Alfallah

Al Pacino and his girlfriend, Noor Alfallah, 29, are expecting a child together. (Backgrid)

The "Godfather" star is expecting his first child with Alfallah. She was previously linked to Mick Jagger and billionaire Nicholas Berggruen. Pacino, who turned 83 years old in April, has three kids: a daughter with his ex Jan Tarrant and twins with his ex Beverly D'Angelo.

Al Pacino smiling on red carpet

Al Pacino allegedly asked his much younger girlfriend for a paternity test. (Photo by Dominik Bindl)

Alfallah shared a snap with Pacino on Instagram in April as they perused a friend's art gallery in New York — the first photo of the couple to make it on her social media grid.

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Earlier this month, D'Angelo posted rare photos of their children and reflected on her "unique" relationship with Pacino.

Beverly D'Angelo and Al Pacino walk arm in arm together at a film premiere

Beverly D'Angelo and Al Pacino dated for years, but were never married. (Steve Eichner/Getty Images)

"My story with Al began 27 years ago, two artists meeting, falling in love. We lived together for seven years, had two children, broke up, but continued steadily on our journey as co parents – and came to share our lives with a deeper kind of intimacy, honesty and acceptance than a ‘traditional’ relationship would have allowed, (for us at least)," D’Angelo captioned a video montage.

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D’Angelo admitted she was "deeply in love" with Pacino and was "one hundred percent in," but the couple never married. They welcomed twins Olivia and Anton in 2001 and split in 2004.

"As for me and Al, it is a unique and profound friendship between two artists that endures to this day, through thick and thin, 27 years now of doing it our way, and there you have it," she said.

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Fox News Digital's Tracy Wright and Caroline Thayer contributed to this report