The dancer, 70, appeared on the panel from the first series in 2004 until quitting in 2019, while Daly and Winkleman stepped down last year after 20 years.
After a successful guest slot last year, KSI has been made a permanent BGT judge alongside veterans Simon Cowell, Amanda Holden and Alesha Dixon, replacing Bruno Tonioli.
Lauren Silverman gave an unprecedented look into the life of her youngest son Eric who she shares with her fiancé Simon Cowell as she spoke in a new interview.
Appearing alongside co-star Bruno Tonioli, 69, the music mogul, 65, sat down with Alison Hammond and Dermot O'Leary on Friday's instalment of the ITV show.