Louis Walsh has likened fellow X Factor judge Tulisa Contostavlos to a "chav in a tracksuit".

The pair are set to feature on this year's new X Factor UK series which is set to debut on Saturday (August 18).

Speaking to the Radio Times, Walsh said Tulisa is a bit "rough round the edges" but is a lot of fun on the show. He said:

"She is a bit rough round the edges and when they announced she was on the panel I was expecting a chav in a tracksuit – which is what we got – but she's a lot of fun. She thinks she’s a bigger star than she actually is though."

60-year-old Walsh, who has now been on the show for nine years, hinted that he could hang up his X Factor boots after the next series. He added:

"Every year I get nervous that Simon Cowell will bring someone new in but I know the show and what works. My ambition is to get to 10 years on the show. After that we'll see. I don't want to be like Brucie on Strictly. I will know when it's time for me to give it up."