As I am not sure whether you mean last (Gyanendra Bir Bikram Shah Dev) or late (ie dead) which were the last two (Birendra Bir Bikram Shah Dev, and Dipendra Bir Bikram Shah Dev), I give the details for all three.
Birendra Bir Bikram Shah Dev
born 28 December 1945
became king 31 January 1972
Died 1 June 2001 (murdered)
Dipendra Bir Bikram Shah Dev
Born 27 June 1971
Became king 1 June 2001
Died 4 June 2001
Gyanendra Bir Bikram Shah Dev
Born 7 July 1947
Became King 4 June 2001
However the monarchy was abolished on 28 May 2008
Still alive but no longer "king"
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