Speaking about her upcoming appearance Holden said: "I think one of the most important things when you are on a show like Britain's Got Talent and judging other people, is to be willing to stand on the stage and put your own self up for judgment.
"The audience along with my TV colleagues Simon, Michael and the Hoff will be sitting in judgment of me. I'm just praying they don't use their buzzers!"
A head of the performance the show's producers have released an image of the full cast, with Holden alongside Nigel Lindsay in the title role, Richard Blackwood as Donkey and Nigel Harman as the diminutive Lord Farquaad.
The cast of Shrek the Musical
The full Shrek company include Delroy Atkinson, Amy Beadel, Stephanie Bron, Dean Chisnall, Jon-Scott Clark, Ste Clough, Lee William-Davis, Ross Dawes, Lucie Downer, Alice Fearn, Michelle Francis, Ashley E Hale, Rosanna Hyland, Bradley Jaden, Aaron Lee Lambert, Emma Lindars, Grant Murphy, Spencer O'Brien, Landi Oshinowo, Damien Poole, Stuart Matthew Price, Jacqui Sanchez, Jonathan Stewart, Leigh-Anne Stone, Lucy Tapp, Karli Vale and Michael Watson.
The screen-to-stage adaptation of the irreverent alternative fairy tale about a lonely green ogre, who finds happiness and conquers a fearsome dragon with the help of a wise-cracking donkey and the tough-talking Princess Fiona, Shrek the Musical premiered in December 2008 on Broadway, where it ran for just over a year. The New York production was nominated for eight Tony Awards, Tim Hatley winning for Best Costume Design of a Musical.
The roles of Young Shrek and Young Fiona are shared by Samantha Allison, Chorlène Biron-Monnier, Lauren Dawes, Madeleine Hill, Emilia Jones and Sophie Wythe.
The Anglo-American creative team is led by directors Jason Moore and Rob Ashford and includes David Lindsay-Abaire (book and lyrics), Jeanine Tesori (music), Tim Hatley (scenic, costume and puppet design), Hugh Vanstone (lighting design), Peter Hylenski (sound design), and Josh Prince (choreography).Shrek is produced by Neal Street Productions and, in the company’s theatrical debut, the Hollywood studio Dreamworks.
- Brenna Weinguss