The corporate lawyer quit her role as Lord Alan Sugar's aide in 2009, leaving to concentrate solely on her PhD in papyrology.
© BBC
© BBC / Talkback Thames
Her former colleague Nick Hewer, who was back on-screen in the new series which began last night, tweeted: "I am pleased to announce that Margaret Mountford may henceforth be addressed as Dr Mountford, as she passed her exam with elan. At last."
Sugar responded: "Congratulations to the now Dr Margaret Mountford for passing all of her exams. Well done."
© Channel 4
Announcing her exit from the BBC One show, the 60-year-old said that the competition "took up a large chunk of time each year, and that's time [she] could, indeed should, be spending on [her] studies".
Hewer, who is currently hosting Channel 4's Countdown, recently confirmed that Mountford would make an appearance in the show's Dictionary Corner.
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