She is born to Sudhakaran Nair and Vasundara on 26 June 1975 at Thiruvananthapuram. Her father was working in Muscat and mother was a school teacher. She had her primary education from Al-Uthuman Higher Secondary School, Kazhakoottam, Trivandrum where her mother was a teacher. She pursued degree from Govt. College for Women, Thiruvananthapuram.

She is married to Malayalam movie cameraman Udayan Ambadi on 1996.

Thooval Kottaram was her first movie in Malayalam. In this movie, she played a character named Hema. After this, she appeared in films such as Kadhanayakan, Veendum Chila Veettukaryangal, Arayannangalude Veedu, Manassinakkare, Passenger and more.

Sona also acted in Priyadarshan's Bollywood comedy films Malamaal Weekly in 2006 and Kamaal Dhamaal Malamaal in 2012. She also acted in two Malayalam anthology films, Naalu Pennungal and Kerala Cafe (in the segment "Makal").

She has acted in many Malayalam television serials, telefilms, albums, advertisements etc. She is an anchor also. She has judged many reality shows. She has participated in many stage shows, game shows too.

In 2004, Sona has received the Best Actress Award in the "Kaveri Film Critics Television Awards" for her role in a telefilm Rachiyamma, telecasted on Doordarshan.^[6] She has been chosen as the Best Female Actor in television category of Sathyan Memorial Awards, 2008. In 2006, she won the Best Supporting Actress award in both Kerala State TV Awards and telefilms category of Sathyan Memorial Awards, for her role in Amrita TV's Samasya.^[7][8] She has also won Best Character actress at Asianet Television awards 2008 & 2011.

Sona was nominated for the Filmfare Award for Best Supporting Actress in 57th Filmfare Awards (South) for her role in the Malayalam movie Passenger. In 2011, she won the Asianet Television Award for "Best Female Actress in a Character Role".^{[citation needed]}

Telefilm

• Snehanilavu (Atmeeya Yathra) - telefilm
• Makal (DD) - telefilm
• Sreeeparvathiyude Paadham - telefilm

• Glotex
• Cellini Dinner Set
• Indulekha Hair Oli
• Aakruti

• Punyavazhiyiloode
• Surya News

• Kannamma

• Onnum Onnum Monnu
• Tharapakittu
• Sarigama
• Comedy Super Nite
• Smart Show
• Annie's Kitchen
• Ividinganannu Bhai
• Dance Party
• Comedy Stars
• Comedy Express
• Munch Star Singer
• Munch Dance Dance
• Idea Star Singer
• Priya Chithram
• Junior Idol
• Rananganam
• Super Dancer Junior
• Veruthe Alla Bharya
• Chayakoottu
• Dr. Lakshmi Nairum Adukkalayil Ninnu Arangathekku
• Badayi Bunglavu
• Fast Track
• Humorous Talk Show
• Malayali Bus
• Ponnonatharam
• Priyamanassukalil Suraj
• Asianet TV Award
• Kitex Flowers TV Award
• Njyattuvela
• Vishu 2012
• Don't Do Don't Do
• Ponnonakoottu
• Comedy Tickets
• Upperi