"My Son Winston Elba was born yesterday..Truly Amazing," the 41-year-old actor wrote. Alongside the caption, the Luther star shared a beautiful black and white photo of his little baby boy holding onto his finger.
The actor also has an 11-year-old daughter, Isan, from a previous relationship.
The British actor has a plethora of projects in the works including a live-action movie adaptation of Rudyard Kipling's classic The Jungle Book.
My Son Winston Elba was born yesterday..Truly Amazing pic.twitter.com/MrSEQPZo4z
— Idris Elba (@idriselba) April 18, 2014
Image via Twitter, Idris Elba