Yes, that's Sam from Love Actually in The Queen's Gambit

Starring Thomas Brodie-Sangster and Anya Taylor-Joy, Netflix show
Starring Thomas Brodie-Sangster and Anya Taylor-Joy, Netflix show 'The Queen's Gambit' has an incredible cast. This is where you recognise them from.

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Thomas Brodie-Sangster as Benny on The Queen's Gambit

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Queen's Gambit fans baffled to realise chess-playing cowboy is Sam from Love Actually - Mirror Online

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Thomas Brodie-Sangster as Benny on The Queen's Gambit