The so-called 'papple' looks and tastes like an apple but has the texture and skin of a pear, and belongs to the pear family.
The fruit is referred to as T109, with an official name still to be decided, reports The Mirror.
Marks & Spencer fruit expert Shazad Rehman said: "This is one of the most exciting new varieties of fruit we have seen for several years.
"We know our customers like to try new and interesting fruit, and we hope this will be something they will really enjoy."
T109 is grown in New Zealand, and is reportedly a mixture of European and Asian varieties of pear, leading to a fruit similar to an apple.
Rehman added: "It's got a lovely refreshing taste, perfect for snacking on, and [is] a fun alternative to an apple a day."
Marks & Spencer are planning to grow the 'papple' in the UK from 2015 onwards.
The fruit will be available to buy at Marks & Spencer stores from next week at £1 each.
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