Ratings have slumped in The Kyle and Jackie O Show‘s former morning radio slot as the star duo’s ex-employer sues them to try to recoup millions in lost profits.

Kyle Sandilands and Jackie “O” Henderson both face a counter-suit from their old employer ARN, which claimed they cost it key advertising revenue through their sacking.

In documents filed in the Federal Court, the broadcaster accuses Sandilands and Henderson of breaching their contracts and making the future of their KIIS FM breakfast show untenable, and maintains they are liable for the subsequent loss of advertising revenue.

The latest radio ratings, released on Thursday, found KIIS FM’s audience share had dropped in the pair’s old time slot in their primary market of Sydney.

The proportion of breakfast listeners on KIIS FM in Sydney fell one percentage point to 11.7 between February 8 and April 4, representing most of the period after the pair’s final show on February 20 and Sandilands’ sacking on March 4.

Conversely, the station’s share grew by 0.3 percentage points in the Melbourne market where Sandilands and Henderson failed to make many in-roads after their expansion in 2023.

In its defence to Sandilands’ lawsuit over his sacking, ARN told the court that Henderson sent a letter in February claiming her co-host repeatedly bullied her.

He allegedly made offensive comments to her in September that prompted her to raise a complaint with station staff.

“Don’t f—ing bother coming back either until you get your f—ing s–t together like a normal person,” Sandilands allegedly told Henderson off-air.

“I’ve been carrying this whole show for f—ing a year.”

The highly public bust-up moved into the legal arena after an on-air exchange between the star pair in February, when Sandilands accused Henderson of being “off with the fairies”.

The comments prompted her to say she could no longer work with him.

In the court documents, ARN said Sandilands was liable for legal costs and lost revenue because he had breaching his contract by committing serious misconduct.

The radio giant claimed Henderson was also liable for the same costs because she breached her agreement by bringing the show to an end.

Both presenters are suing ARN separately for breaches of their respective contracts, with Henderson claiming she should not have been fired just for refusing to work with Sandilands.

Henderson alleged in court documents she complained to station management multiple times over about six months about comments from Sandilands.

He allegedly said some of Henderson’s comments were “weird, psychological bulls–t” and her belief in “hype words” was having a bad effect on her dating life.

But Sandilands’ suit claims he did not deserve to have his contract torn up because he had not committed serious misconduct.

Both are seeking the full payout of the remainder of their 10-year, $100 million contracts, which were signed at the end of 2023.

Both cases are due for a preliminary hearing on Friday.

-AAP