Question: did one of the twins from full house die

Answer: No, Mary-Kate Olsen and Ashley Olsen (born June 13, 1986), also known as the Olsen twins collectively, are American fashion designers and former child actresses. The identical twins made their acting debut as infants playing Michelle Tanner on the television series Full House. At the age of six, Mary-Kate and Ashley Olsen began starring together in TV, film, and video projects, which continued to their teenage years. Through their company Dualstar, the Olsens joined the ranks of the wealthiest women in the entertainment industry at a young age.