Idris Elba, Naiyana Garth

Idris Elba and his girlfriend Naiyana Garth welcomed their first child together on Thursday.The Luther star shared the happy announcement on Twitter, along with a photo of his newborn son Winston holding his finger.

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My Son Winston Elba was born yesterday..Truly Amazing :-) pic.twitter.com/MrSEQPZo4z — Idris Elba (@idriselba) April 18, 2014

This is Elba's second child. He also has a daughter Isan, 11, with his ex-wife Dormowa Sherma. Elba, 41, has been dating Garth, a makeup artist, since March 2013.