“Genuinely it was the Ayda card. Genuinely,” he told ITV’s Lorraine show. “You know, I thought about doing it often but I have been really, really busy with my own career and then Ayda got a call in the car from Nigel the producer of the show and said do you think Rob will do it if you do it too?
“And instantly, I was like that makes complete sense – I’m totally in.”
Since the new judging line-up was announced, some X Factor fans have been wondering what qualifies US actress Ayda for a place on the panel – but perhaps they’ll see the two-for-one deal as worth it now they know that’s what finally got Robbie on board.
The new series of The X Factor launches on Saturday 1st September at 8pm and continues the next day at the same time