Ilyas fell into comedy after googling online writing courses and completing a week long open mic workshop, before becoming a comedian in 2010. In June 2015, Ilyas made a short filmThe Fast and the Fool as part of the British Muslim Comedy series, five short films by Muslim comedians commissioned by the BBC to be released on BBC iPlayer. Ilyas goes through the day in the life of a fasting Muslim, and shows how he copes with the stresses and strains of an ordinary day in the office during Ramadan. In July 2015, Ilyas performed at an Eid Special Comedy Night at The Comedy Store in London. In December of the same year, he performed at BBC Asian Network's special comedy night, celebrating 50 years of Asian programmes on the BBC with a special comedy night in Birmingham. Ilyas has performed at the Edinburgh Festival Fringe four times. In 2011, he was in a three hander with Gary Tro and Kate Lucas called Gags Songs and Bombs. In 2013, he was on the comedy reserve in the Pleasance Dome. In 2014, he performed for a week. Ilyas' debut show TEZ Talks resembles TED Talks, the popular conference lecture series Ilyas' show is inspired by his life as a British Muslim and defuses numerous misconceptions about Islam. His show is staged as an introductory seminar in becoming a convert to Islam with the audience playing the part of potential new recruits. This enables Ilyas to explain the intricacies of his belief system, while putting 'bigoted' misconceptions to bed. He gives a series of mock-inspirational speeches on integrating into British society, and explains concepts like jihad and Ramadan with 'unpatronising good humour', explores "British values" and debunks Islamophobic abuse. In August 2015, Ilyas performed the show at the Pleasance Courtyard at the Edinburgh Festival Fringe. In February 2016, he performed the show at London's Soho Theatre. A BBC Radio 4 series based on Tez Talks was commissioned, and has run for 3 series. Ilyas was awarded a place on the BBC's writers academy and has written and filmed his own scripted comedy short for Sky. He has appeared on both The Now Show and the Children in Need Comedy Gala for BBC Radio 4, and appeared on both Virtually Famous on E4 and Live From the BBC on BBC Three. He has appeared as recurring character 'Eight' on BBC Three comedy seriesMan Like Mobeen, alongside comedian and actor Guz Khan. In December 2018, Ilyas featured in comedy short Bounty, a 'Comedy Blap' by Channel 4, which was set in his hometown of Blackburn. In January 2019, it was announced that Ilyas would host a new satirical comedy show on Channel 4, The Tez O'Clock Show, broadcast from the dock10 studios. In June 2020, he released a special, Teztify, on YouTube.
In 2020, Tez Ilyas left his position on the comedy industry body, the Live Comedy Association. Ilyas admitted to sexually harassing multiple women throughout his career and wrote an apology on his Twitter account. Ilyas is a Muslim and is based in Clapham, London. He is a Blackburn Rovers Football Club fan. Ilyas cites television shows such as South Park, The Thick of It and Blackadder, but most importantly the dry humour of the people of his home town Blackburn and his father, as inspiring him most.
