Karun Chandhok and Narain Karthikeyan will team up again to represent Team India in this year's Race of Champions.
The pair made their debut in last year's event, winning the inaugural RoC Asia title to clinch a place in the main Nations' Cup competition.
Chandhok has balanced competing at Le Mans this year - he finished seventh in LMP2 in the Murphy Prototypes ORECA-Nissan - with commitments in the FIA GT Series. Karthikeyan, meanwhile, competed in Auto GP, claiming five wins and seven podiums en route to fourth in the championship.
"Narain and I had a great time together last year and it was fantastic to be the first RoC Asia winners," Chandhok said. "It was really nice to drive such a variety of cars and we both have more experience this year and know a bit more about how it all works.
"The chance to spend time with such a great mix of drivers from a huge variety of championships around the world is a lot of fun."
Karthikeyan, who teamed up with Chandhok in the 2004 World Series by Nissan, added: "It will be a great privilege to represent India again at the Race of Champions. We had a great time at our first attempt when we won RoC Asia but it is always a challenge to jump into different cars and adapt quickly. However, with the experience of the 2012 event behind us, we feel more confident and better prepared this time."
Newly crowned World Rally Champion Sebastien Ogier, nine-time Le Mans winner Tom Kristensen and seven-time Formula 1 champion Michael Schumacher have all signed up to contest this year's event, which takes place in Bangkok's Rajamangala Stadium on Dec. 14-15.