For the first time since the mid-'90s, when David Letterman and Jay Leno battled and YouTube wasn't but a glint in the eye of the internet, 'The Late Show' has beaten 'The Tonight Show' in the coveted 18-44 demo for a full season on US television.
Stephen Colbert started slowly in 2015 but came into his own during the Republican convention and never looked back. Fallon, meanwhile, attracted criticism for ruffling Donald Trump's hair. Welcome to 2019, folks...
While Colbert has beaten Fallon for longer in overall viewers, Fallon had the edge for some time on that 18-44 demo, who the advertisers love. 'The Late Show' has 3.84 million overall viewers - 1.36 million people ahead of 'The Tonight Show' with 2.48 million, according to THR.
Fallon, though, has over 21 million subscribers on YouTube compared to Colbert's 6.3 million. Sure look, Conan is the best of the bunch anyway.
In the following timeslot at 12.35, Seth Meyers continues to lead over James Corden, albeit by a slim margin.