Andrew Morton, author of Meghan: A Hollywood Princess, hospitalised after London speaking event

Royal biographer Andrew Morton has been hospitalised after becoming unwell during a speaking engagement in London.

"He became unwell this afternoon, he's been taken to hospital as a precautionary measure," said the spokeswoman told Reuters.

Morton is best known for his biography of Princess Diana, published in 1997.

His latest book is about Prince Harry's fiance Meghan Markle - Meghan: A Hollywood Princess.

BARCELONA, SPAIN - APRIL 23:  Writer Andrew Morton poses during Sant Jordi day celebrations on April 23, 2013 in Barcelona, Spain. Sant Jordi is a Catalan holiday and is similiar to Valentines day, but during the day roses and books are exchanged between loved ones and collegues.  (Photo by Robert Marquardt/Getty Images)
Andrew Morton. Source: Getty