April 18, 2014 at 04:50 PM EDT

Idris Elba is a dad again! The actor and his girlfriend Naiyana Garth welcomed a baby boy, named Winston, to the world April 17.

This is the first son for Elba and Garth, but Elba also has an 11-year-old son with previous wife Dormowa Sherman.

Elba announced the news on his Twitter with a photo of baby Winston grasping his finger:

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