Caroline Flack will be joined by 21-year-old stand-up comic Matt Richardson on the new series of The Xtra Factor.
Richardson, who has been performing on the comedy circuit for two years, replaces Olly Murs, who is stepping down to focus on his music career.
The new Xtra Factor lineup begin filming for series 10 of X Factor next week. They will be working alongside the new look lineup of judges, which features Louis Walsh, Gary Barlow, Nicole Scherzinger and Sharon Osbourne.
"I cannot describe how excited I am to be joining The Xtra Factor," said Richardson.
"Working with Caroline and the rest of the team will be an incredible experience and I will do my best to be as good as I possibly can, because I'm never going to be as gorgeous as Olly Murs."
Flack said: "I'm really excited to be hosting Xtra Factor for the third year! Of course I'm going to miss Olly every day, but I am very proud that his music is doing so well all around the world.
"I really feel that Matt will bring something completely different to the show. He's a real find, he makes me laugh and it's great to introduce new talent. I can't wait to get started."
ITV's director of digital channels Angela Jain said that Richardson would bring a "different dimension" to the ITV2 spinoff show, declaring that it would be coming "back with a bang".
Richard Holloway, from show producers Thames, added: "They've got great chemistry and as soon as we saw them together we knew they were a winning combination."
The X Factor and The Xtra Factor return to ITV and ITV2 this autumn.
Airs after the UK X Factor on ITV2 and usually is even more entertaining than the main show
They have callers ask the judges and contestants questions, interview them and get more behind the scenes stuff with live performances
I'll Miss CarOlly but still will look forward to new blood