Robbie Williams and his wife Ayda Field are being sued by a former assistant, who claims he was subjected to a barrage of sexual harassment when he worked for the famous couple.

Gilles De Bonfilhs was fired from his position in January after working for the Angels singer and his partner for a short time.

TMZ reports that he has since filed a lawsuit against the pair, alleging he suffered harassment at the hands of the Turkish-American actress.

According to the suit, the mother-of-two would allegedly walk around in various stages of undress, openly discuss her sex life and often ask him to comment on her body.

Although Williams is named as a defendant, De Bonfilhs has made no sexual harassment allegations against the former Take That star.

The couple's representative has since condemned the claims as nothing more than unsubstantiated lies from "a disgruntled former employee" who was sacked for serious misconduct.

"Any proceedings will be strenuously defended. There will be no further comment on the matter as it is in the hands of the lawyers," the spokesperson told IBTimes UK.

Meanwhile, new X Factor hosts Olly Murs and Caroline Flack have said they would love the Rock DJ hitmaker to replace outgoing judge Louis Walsh on the panel, revealing they are all doing all they can to persuade him.

"I'd love Robbie. He'd be the dream. He loves the show. I just don't know if he would do it," Flack told the Mirror. "He's been brilliant at Judges' Houses. I want Snoop Dogg! How good would that be?"

Murs, who shot to fame on the show in 2009, added the 41-year-old rocker had "great charisma".

He said: "We just did the O2 together and I was in his ear the whole time trying to persuade him. I'm failing, though. You need someone who has a great charisma and is very funny."