Idris Elba is a doting daddy!

The "Mandela: Long Walk to Freedom" star took to Twitter Friday to announce that his girlfriend Naiyana Garth has given birth to a beautiful baby boy.

"My Son Winston Elba was born yesterday. Truly Amazing," the 41-year-old wrote, along with a sweet snapshot of his son's hand clasping his finger.

This is the couple's first child together. He is also a father to daughter Isan with ex-wife Dormowa Sherma.

The former "Wire" actor has been busy lately, starring in box office hits like "Prometheus," "Pacific Rim" and "Thor: The Dark World."

Congrats to the growing Elba family! 

Click "Launch Gallery" above to see more cute celebrity kids.

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