TV mogul Simon Cowell may quit as a judge on `Britain's Got Talent`, fears fellow judge and singer Alesha Dixon.

After Collabro, a five-piece boyband, won this year's series of the hit show, Dixon, 35, fears that Cowell will now walk out on the series and won't return in 2015, reports dailystar.co.uk.

She is convinced the move would leave the show in tatters and ratings would plummet.

"When Simon is on the panel people really want to impress him. They want to come along and get his approval. So it wouldn't be the same show without him,` Dixon was quoted as saying.