The 41-year-old actor and his ex-girlfriend Catherine Harding are set to welcome their first child together into the world early next year.
Despite their split, the exes are determined to put everything into raising the baby.
A representative for the star told People: "I can confirm that Jude Law and Catherine Harding are expecting a child together in the spring. They consider this a private matter and other than this confirmation no statement will be made. I ask that you respect the privacy of all parties involved and their families."
The "Holiday" star already has three children, sons Rafferty, 18; and Rudy, 12; and daughter Iris, 13; with his ex-wife Sadie Frost, who he divorced in 2003, who he shares custody with.
He also has a five-year-old daughter, Sophia, with American model Samantha Burke following a brief fling in 2008.
This latest development is somewhat of a surprise as Jude has been mostly single over the past few years.
He was last linked to actress Ruth Wilson until earlier this year after they often photographed together, although she insisted they were just friends.
In 2008 - before his fling with Samantha - Jude was photographed kissing Rod Stewart's socialite daughter Kimberly, who has since gone to have a child with Benicio Del Toro.
Aside from his wife Sadie, Jude's most high-profile romance was his on-off relationship with Sienna Miller.
The couple met on the set of Alfie in 2003 shortly after his separation from Sadie, with the actor proposing on Christmas Day 2004.
However, their romance was rocked when in July 2005 it was revealed he had had an affair with his former children's nanny Daisy Wright four months earlier while filming in the US.
The actor publicly apologised at the time, saying: "I am deeply ashamed and upset that I've hurt Sienna and the people most close to us. I want to publicly apologise to Sienna and our respective families for the pain that I have caused. There is no defence for my actions which I sincerely regret and I ask that you respect our privacy at this very difficult time."
