For four seasons Louis Cato stood at the front of the most-watched bandstand in American television, leading the house band on The Late Show with Stephen Colbert from September 6, 2022 until the series finale on May 21, 2026. That is the fact most people know about him, and it is the last one to arrive. Before it he spent a decade as a working sideman on jazz bandstands: several years in Marcus Miller's touring band, the drum chair in John Scofield's Überjam group, the road with Bobby McFerrin, record dates for Donald Harrison and Lakecia Benjamin. The television job made him famous. It did not make him a musician, and it is not what his playing is built out of.

He was born in Lisbon on May 3, 1985, while his father was stationed in Portugal with the United States military. The family left within months of his birth and settled in Albemarle, North Carolina, a small town east of Charlotte, when he was five. His mother was a church organist and pianist in the Church of God in Christ tradition, and the house rule was that only sacred music got played in it. Cato has said he came to secular music sideways, through supermarkets and car radios, which is why he met a great deal of the pop and rock canon late. He started on drums at two, added guitar at eight, and picked up bass, trombone, tuba and euphonium through school band. By his own account, the ceiling he could see from Albemarle was a job teaching tuba. Two local band directors told him to aim higher and one of them handed him a Berklee brochure.

He took a scholarship to Berklee College of Music in Boston and left after two semesters, in 2004, for the working life. The important room in that period was not a classroom: it was Wally's Cafe on Massachusetts Avenue, the small jazz club a mile from campus where he played in the band Dark Matter with Andrew Marsh, Corey Bernhard and saxophonist Khris Royal. Royal grew up around the corner from Jon Batiste in New Orleans and brought him by one night, a passing encounter that would matter a decade later. Cato's first touring work came with saxophonist André Ward and singer Robin McKelle, on European festival runs. He met Marcus Miller at a jam session at the North Sea Jazz Festival and joined Miller's band, holding the drum chair for several years. In November 2012, travelling between a gig in Monte Carlo and one in Amsterdam, Miller's tour bus crashed. The driver was killed. Cato broke his back in two places and sprained his neck. A little over a month later he was onstage at the Berklee Performance Center for a Boston First Night gig, drumming with Scofield's Überjam band.

The Scofield association produced his most durable jazz credit. On Überjam Deux, recorded in January 2013 at Sear Sound in New York, Cato and Adam Deitch split the drum chair, Cato taking four of the eleven tracks: "Endless Summer," "Al Green Song," "Scotown" and "Torero." The rest of the band was Scofield on guitar, Avi Bortnick on guitar, sampler and co-production, Andy Hess on bass, and John Medeski guesting on organ, Wurlitzer and Mellotron across five tracks. In March 2015 Batiste, remembering the Wally's night, asked Cato to produce a session for a television theme. Cato ended up playing drums, bass, guitars and keyboards on it and singing background vocals, and when Batiste was named bandleader of Colbert's Late Show he brought Cato into Stay Human. Cato joined at the show's September 2015 inception and covered as interim leader whenever Batiste was away.

Batiste left in August 2022 and Cato took the band over on September 6, first as Louis Cato and the Late Show Band and, from February 16, 2026, as Louis Cato and the Great Big Joy Machine. He used the writers' and actors' strikes of 2023 to finish Reflections, an eight-song record he wrote, produced with Jack DeBoe and played entirely himself. That summer he became a festival bandleader for the first time: a set at the Newport Jazz Festival on Saturday, August 5, 2023, after sitting in with Batiste, with Larry Goldings guesting on Hammond B-3, and two sets at the Monterey Jazz Festival on September 23, on the Jimmy Lyons and West End stages, with Goldings, Jeremy McDonald on bass and Charles Haynes on drums. He had been to both festivals before, as a sideman with Scofield, Batiste, McFerrin and Snarky Puppy, and never as a leader. In 2025 he went back to Newport at the head of a new trio with Scofield and Miller, which the Boston Globe called a blues-soaked debut and which had released the single "Black Man Blues" six weeks earlier. The Great Big Joy Machine's self-titled album, eleven collective originals plus a Sam Cooke song, was recorded at the Ed Sullivan Theater and released for charity on June 12, 2026, three weeks after the show ended.

Cato is a generalist by conviction rather than by accident, and he says so plainly: he is at peace with the idea that his gift is spread across a number of areas rather than concentrated in one. His touch as a drummer is unshowy and deep in the pocket, which is why Miller kept him for years and why Scofield used him on the loosest, most groove-driven records of his catalogue; as a guitarist he describes himself as a rhythm player, interested in feel and phrasing rather than in soloing. The foundation is Church of God in Christ music, and specifically his mother's left-hand bass playing, which gave him a sense of the bottom of a chord before he had any theory to attach to it. On top of that sit Bill Withers, the traditional folk and blues repertoire, and both old-school and modern hip-hop. His own songwriting is soul and singer-songwriter music rather than jazz, which he has never pretended otherwise about; what he brings to jazz he frames as a duty of translation. Asked at Newport what his role in the music is, he answered that part of his job is to be a presenter, and that he gets to present a lot of traditional nuance and vocabulary to an audience that otherwise would not be exposed to it. AllMusic files him under jazz first, with styles running from post-bop through jazz-funk, and All About Jazz keeps a musician page for him under jazz guitar.