Both channels boast nearly 90 million subscribers, but as of March 18, T-Series gained a narrow 50,000 follower lead.
Notably, PewDiePie had been the most-subscribed channel on the video platform for six years - a feat now has been broken by the rapid rise of T-Series. Nearly all the Bollywood stars including Salman Khan, Varun Dhawan, Arjun Kapoor and John Abraham were seen supporting T-Series.
At the time of filing this report, both the channels had crossed 90.74-million subscribers and the gap was down to a single-digit lead.
Other YouTubers such as CarryMinati and Jus Reign have voiced their support for T-Series.
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Most recently, Kjellberg saw his brand being accused of supporting violence when it was used by the attacker in the New Zealand mosque shootings, who reportedly urged people to subscribe to PewDiePie in a live Facebook streaming of the massacre.
What's more, PewDiePie's channel has been criticized for some of its content.
PewDiePie's YouTube channel now stands at 90.409m subscribers.
While for PewDiePie, the fight is about an individual vs a corporate, for T-Series the fight has become a nationalistic one.
Social Blade, a website that contains subscriber predictions, projected that T-Series will gain 100 million subscribers by May 2019. A few days ago, T-Series chairman Bhushan Kumar had tweeted an appeal to Indian viewers to increase its subscriber count. For instance, in 2018 he drew heavy criticism when he paid two Indian men to hold a sign that said "Death to all Jews". "I feel absolutely sickened having my name uttered by this person".
The YouTube channel of T-Series was launched on 13th March 2006. He later deleted those videos and apologized. It is also the channel with the most number of views - 65,359,675,727 as per the latest count.