Ion Cyclotron Resonance Heating (ICRH) experiments have been carried out in reactor relevant scenarios during the Deuterium-Tritium (DTE1) campaign in JET. For the first time it has been possible to assess the deuterium minority in tritium plasmas (D)T scheme: this produced a steady-state DT fusion power up to 1.66 MW for input ICRF power of 6 MW. Strong ion heating, with core ion temperature up to 13 keV, has been observed when using 3He minority heating in both 50:50 D-T and tritium dominated H-mode plasmas. Second harmonic tritium heating has also been studied and, as expected for JET plasma conditions, it has produced mainly electron heating. Finally, the inverted scenario of tritium minority in deuterium (T)D was successfully demonstrated.