I'll try my best to provide updates for Ramayanam serial telecast on Sunday mornings from 10:30 to 11:30 AM.
Any doubts, discussions and information to share is most welcome.
Here is what I know about this serial.
This Ramayan is a Sagar Arts serial. This is the Sagars' second attempt at Ramayan. The first version by Ramanand Sagar was telecast about 20 years ago with Arun Govil as Ram, Deepika as Sita, Sunil Lahri as Lakshman. It was dubbed in Tamil and telecast in Tamil Nadu as well.
This second Ramayan is again a Sagar Arts show but I think was done in collaboration with NDTV Imagine (not sure about this information)
Cast of this new Ramayan:
Ram - Gurmeet Choudhary (Though he is a Hindi artist, he has acted in a negative role in a Tamil Serial by name Maayavi which was telecast in Jaya TV in 2005. It was the first 3D TV serial in Tamil. He has acted in movies too - Koi Aap Saa, Cycle Kick and also in Hindi Reality Shows such as Pati Patni aur Woh.
Sita - Debina Bonnerjee - (She has also acted in Maayavi as the heroine. She had acted in the Tamil film Perarasu - her name was changed to Damini for the Tamil Cine Field. She is a trained singer and Kathak dancer.)
Lakshman - Ankhit Arora (This is his debut performance - he is a trained singer and hopes to release his album soon.)
Urmila - Meenakshi.
Bharat - Vijay Bhatia (He has acted in other Sagar Arts serial like Jo Ishq ki Marzi Woh Rab ki Marzi and one ofhis serials is telecast in DD National)
Shathrugan - Lalit Negi
Dasarath - Pankaj Kalra (He is a famous actor and he has acted in Hindi movies and serials and Sagar Arts Shows. Some of the serials in which he makes his appearance are - Jo Ishq ki Marzi Woh Rab ki Marzi, Mahima Shani Dev Ki, Vijay - Desh ki Ankhen etc.)
Kaushalya - Rajni Chandra (She has acted in many movies and Sagar Arts serials - Dharam Veer, Dharthi ka Veer Yodha Prithviraj Chauhan, Mahima Shani Devi ki to name a few)
Hanuman - Vikram Sharma.
Vibhishan - Vinod Kapoor (He is mostly seen in supporting roles - He had played a minister in the court of Prithviraj Chauhan in Dharti ka Veer Yodha Prithviraj Chauhan and also made his appearance in Mahima Shani Dev Ki)
Ravan - Akhilendra Mishra (A very famous actor both in movies and serials. He was well known for his role in Chandrakanta as Krur Singh.)
Mandodari - Jaya Ojha.
Dhanyamalini - Another wife of Ravan (perhaps second to Mandodari in preference and mother of Atikay) played by a Gujarati actress Charul Bhavsar. She has also acted as a queen in one of the stories in Kahaaniya Vikram aur Betaal ki.
Indrajeet - Praphulla Pandey (He had acted in some TV serials and as Karna in Sanjay Khan's Maharati Karan, Mahabharat and Jai Hanuman. Recently he has acted as Hari Singh in Mahima Shani Devi Ki)
Sulochana - Supriya Walia.
Kumbhkaran - Rakesh Deewana, the best Kumbhkaran I have ever seen.