1. Karthik Rathnam is an Indian actor who works in Telugu cinema and theater. 

2. He was born in 1996 or 1997 and started his career in short films. 

3. He is known for his roles in C/o Kancharapalem (2018), Gods of Dharmapuri (G.O.D), and the Tamil remake of C/o Kancharapalem. 

4. Rathnam's first role was Joseph in C/o Kancharapalem, which was the first Telugu film to be screened at the New York Film Festival in 2018. 

5. He also appeared in Gods of Dharmapuri on ZEE5, playing Ravi Reddy. 

6. Rathnam's other credits include Rosy Theatre Kanapur, The Beginning, C/o Kaadhal