Alka was born on 21st September 1975 to Mr. Amar Nath Lamba and Mrs. Raj Kumari Lamba in New Delhi, India. She has done M.SC (Chemistry), M.ED from Delhi University. She was married to Mr Lokesh Kapoor but separated later. The couple has a son Hritik who lives with Alka.
She began her political career in 1994 when she was in second year of B.Sc where she joined the National Students Union of India (NSUI) and had taken the responsibility as Delhi State Girl Convener. After one year in 1995, she contested the Delhi University Students Union(DUSU) election for the post of President and won by a huge margin. From 2002-2006 she was the General Secretary All India Mahila Congress. Alks unsuccessfully contested 2003 Delhi Assembly Election against former CM of Delhi Shri Madan Lal Khurana. She was appointed as Vice Chairperson of NIPCCD, an autonomous body of Ministry of Women and Child Development.
Go India Foundation (GIF), an NGO is run by Alka. The NGO caught all attentions in 2010 during its blood donation campaigning. Significantly, over 65,000 people donated blood in one day (Aug 15, 2010).Famous Bollywood superstars including Salman Khan, Ritesh Deshmukh, Dia Mirza and many more worked for promoting Alka’s NGO and the great cause for which her NGO was working.