There is a new change coming to the Dora the Explorer. You might not notice it at first, but if you listen intently you will be able to hear it. The voice behind Dora the Explorer has changed. Although Dora has not aged one bit since she premiered in 2000, the young lady that has done her voice since that time has. Kathleen Herles , who is now 17, has left her voice over position as Dora the Explorer and the position will now be held by 12 year-old Caitlin Sanchez.