Popular tv show Mrs Brown's Boys has been making us laugh for almost ten years.Brendan O'Carroll first graced our screens as lovable Irish granny Mrs Brown in 2011 and has been a household name ever since.O'Carroll, who created the series and stars as main character Agnes, has roped his family and close friends into making up the rest of the cast.While the show has received some scathing reviews from critics over the years, viewers can't get enough of the Brown family's antics and switch on in their millions.While the cast are full of joy and laughter on screen, there has been tragedy and heartbreak off camera.The original cast line-up has not remained intact, with one very prominent star leaving his role in mysterious circumstances.While