Jean Milburn is played by Gillian Anderson
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Netflix's Sex Education: Meet the cast

5. Jean Milburn is played by Gillian Anderson
Otis' sex therapist mum, Jean, is played by British acting legend Gillian Anderson. Gillian made her name as Agent Dana Scully in the iconic 90s thriller TV show 'The X Files'. The Emmy and Golden Globe award-winning actress has also starred in 2008's 'How To Lose Friends & Alienate People', 2018's 'The Spy Who Dumped Me', drama series 'The Fall' as Stella Gibson and NBC's 'Hannibal' as Bedelia du Maurier. Gillian is set to star as Margaret Thatcher in 'The Crown' season 4. [Netflix]