Complete List of Prime Ministers of India:

Complete List of Prime Ministers of India:

1. Jawaharlal Nehru: pm office duration- 15 Aug 1947 to 27 May 1964 
2. Gulzarilal Nanda: pm office duration- 27 May 1964 to 9 Jun 1964
3. Lal Bahadur Shastri: pm office duration- 9 Jun 1964 to 11 Jan 1966
4. Gulzarilal Nanda: pm office duration- 11 Jan 1966 to 24 Jan 1966
5. Indira Gandhi: pm office duration- 24 Jan 1966 to 24 Mar 1977
6. Morarji Desai: pm office duration- 24 Mar 1977 to 28 Jul 1979
7. Charan Singh: pm office duration- 28 Jul 1979 to 14 Jan 1980
8. Indira Gandhi: pm office duration- 14 Jan 1980 to 31 Oct 1984
9. Rajiv Gandhi: pm office duration- 31 Oct 1984 to 2 Dec 1989
10. Vishwanath Pratap Singh: pm office duration- 2 Dec 1989 to 10 Nov 1990
11. Chandra Shekhar: pm office duration- 10 Nov 1990 to 21 Jun 1991
12. P. V. Narasimha Rao: pm office duration- 21 Jun 1991 to 16 May 1996
13. Atal Bihari Vajpayee: pm office duration- 16 May 1996 to 1 Jun 1996
14. H. D. Deve Gowda: pm office duration- 1 Jun 1996 to 21 Apr 1997
15. Inder Kumar Gujral: pm office duration- 21 Apr 1997 to 19 Mar 1998
16. Atal Bihari Vajpayee: pm office duration- 19 Mar 1998 to 22 May 2004
17. Dr. Manmohan Singh: pm office duration- 22 May 2004 to 2009
18. Dr. Manmohan Singh: pm office duration- 22 May 2009 to Incumbent

Indian constitution does not have provision of acting prime minister this is reason 
Gulzarilal nanda is stated as the prime minister of India.