Dharamshala, June 19 (UNI) Union Minister for Parliamentary Affairs Kiren Rijijiu, Chief Minister of Arunachal Pradesh Pema Khandu and Chief Minister of Sikkim Prem Singh Tamang and Chief Executive counsellor Ladakh Autonomous Hill Development Centre Tashi Gyalson will attend the 90th birthday celebrations of Tibetan spiritual leader Dalai Lama here at the main Tibetan Temple at McLeodganj on July six.