J. T. Hellstrom and Colleen Carlton are fictional characters and a supercouple from the American CBS soap opera The Young and the Restless. J. T. was portrayed by Thad Luckinbill, and Colleen was portrayed by three different actresses during the pair's time together, including Lyndsy Fonseca, Adrianne León, and Tammin Sursok. They are often referred to by the portmanteau "Jolleen" by fans on internet message boards and in magazines. Many other famous celebrities appear on this show.