who is the aforementioned person?
She is a British actress, screenwriter, activist, author and comedian.
Emma Thompson
Dame Emma Thompson (born 15 April 1959) is a British actress, screenwriter, activist, author and comedian. 
who played professor sybil trelawney in harry potter Emma Thompson.
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Emma Thompson [SEP] Introduction
Dame Emma Thompson (born 15 April 1959) is a British actress, screenwriter, activist, author and comedian. She is one of Britain's most acclaimed actresses and is the recipient of numerous accolades, including two Academy Awards, a Primetime Emmy Award, three BAFTA Awards and two Golden Globe Awards. Born in London to English actor Eric Thompson and Scottish actress Phyllida Law, Thompson was educated at Newnham College, University of Cambridge, where she became a member of the Footlights troupe. After appearing in several comedy programmes, she came to prominence in 1987 in two BBC TV series, "Tutti Frutti" and "Fortunes of War", winning the BAFTA TV Award for Best Actress for her work in both series.