Sienna Miller, Priyanka Chopra and Sophie Turner are obsessed with this Mango coat

You know you've got a high-street hit on your hands either when it blows up Instagram, or when all the celebrities are wearing it - let's face it, if you've got your pick of all the designer items, you're not likely to shop on the high street.

And Sienna Miller, Sophie Turner and Priyanka Chopra are all fans of a brown Mango coat this season.

The longline tailored coat is part of the AW18 collection, and features a classic collar and button fastening.

Sienna wore hers over jeans while travelling at Heathrow, while Sophie Turner wore it out on a date night in London with her fiancé Joe Jonas.

Meanwhile, either Priyanka Chopra borrowed the coat off her sister-in-law, or loved it so much she bought her own, because she too was spotted wearing it this winter. She dressed it up with a printed blouse and wide leg trousers, while Sienna and Sophie teamed it with jeans for a more casual look.

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Sadly, the coat went in the sale, and promptly sold out, however I've found virtually the same one for you. Get it quick before it's gone, it's the perfect shade for the season.