Dev Patel is playing Ramanujan. Stephen Fry is also in this one.
The Man Who Knew Infinity - IMDb
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Growing up poor in Madras, India, Srinivasa Ramanujan Iyengar earns admittance to Cambridge University during WWI, where he becomes a pioneer in mathematical theories with the guidance of his professor, G.H. Hardy.
The Man Who Knew Infinity - IMDb
Source