"Neeti is like my sister. She has struggled and reached where she is now all because of her hard work. She has a lot of experience on stage, so I am confident that she is a great mentor to the kids," Harshdeep said in a statement.
"The Voice India Kids" is an Indian version of the internationally acclaimed reality format "The Voice".
The show features Neeti as a coach alongside Shekhar Ravjiani and Shaan.
Talking about the young aspiring singers on the show, Harshdeep said: "It's so amazing to see these little kids sing so well at such a young age. It's unbelievable sometimes and also very inspiring."
Ace composer Shantanu Moitra and musician Amit Trevedi are seen as battle advisors for Shaan and Shekhar's teams.
The show is aired on &TV.