Widely-adored Harry Potter actress Miriam Margolyes has revealed she's been rushed unexpectedly to A&E, sharing an update with her fans with a selfie from her hospital bed.The movie star – famed for playing Professor Pomona Sprout in the wizarding franchise – was diagnosed with a severe chest infection, after which she was promptly admitted to hospital. Miriam, 82, also confessed she'd hoped to be sent home from the medical facility on Sunday, before she was told she had to be kept in for another night to be assessed.The no-nonsense Harry Potter favourite – whose most prominent appearance was during the second of the eight movies, The Chamber of Secrets, where she famously knocks out student Neville Longbottom with the sound of a screaming mandrake plant – took to social media to explain she was being treated in Royal Brompton and Harefield Hospital. Sharing an exhausted-looking snap from her bed – donning a hospital gown – Miriam captioned the selfie: "Thanks to my precious friends who thought of me on Tavi Day.