The judging line-up has been unchanged for a decade, but who went before them?
The TV star's skimpy outfits have been criticised in the past.
Cowell, David Walliams, Alesha Dixon and Amanda Holden were joined by hosts Ant McPartlin and Dec Donnelly at The London Palladium.
The new singing contest is set to launch on ITV.
A big-name line-up features in the new Simon Cowell show.
Alesha Dixon was eight months pregnant when she was fronting 'The Greatest Dancer' with Jordan Banjo.
The Britain's Got Talent judge says she wants her daughters to be able to see her perform on stage.
The mother-of-two said she did not have a bad childhood despite witnessing violence.
Phillips was axed from 'Strictly Come Dancing' in 2009, sparking a huge debate about ageism in TV.
Show bosses originally postponed production on the ITV show.
The 'Britain's Got Talent' star is struggling with the juggle like the rest of us.
The audition stages of the show were set to be filmed at the end of January.
It comes after Diversity's dance routine prompted more than 24,500 complaints.
The routine triggered thousands of complaints to broadcasting watchdog Ofcom.
Ashley Banjo channels Elton John by walking out to I'm Still Standing after Diversity's Britain's Got Talent performance sparks more than 15,000 complaints
There was a mixed response to the troupe's Black Lives Matter-themed routine.
Ashley Banjo will fill in for Simon Cowell on the judging panel.
The 60-year-old broke his back after a bike accident but Alesha Dixon is hoping he will still be a part of 'Britain's Got Talent'.
Arlene Phillips has commented on rumours Strictly Come Dancing will include a same-sex pairing on the next series of the show.
Amanda Holden has revealed her gratitude that 'Britain's Got Talent' boss Simon Cowell has kept her on the show, because it 'pays her mortgage'.
All five Golden Buzzer acts have been selected for the 2020 competition.
Britain's Got Talent star says it is her favourite reality show - but what would it take for her to enter the Jungle?
The talent show returns to ITV at the weekend.
The broadcaster is 'doing everything it can' to see the show go ahead as usual
The singer suffered major blows when it came to her personal life and launching her solo career - but she managed to turn it all around.