The show is available for a full week
The concert is hosted Bonnie Langford (42nd Street) and Trevor Dion Nicholas (Disney's Aladdin), and is set to be streamed live from 7pm BST.
Featuring a raft of West End talent coming to you live, the event is available for 7 days.
While free, please consider donating to the Theatre Support Fund Plus to help the beleaguered industry get back on its feet.
There are two ways to do this – you can either go to the show's website or, if based in the UK, text 70460 with the following:
Theatre 10 to 70460 to Donate £10
Theatre 20 to 70460 to Donate £20
Theatre 30 to 70460 to Donate £30
Watch the show below!
The line-up features Aisha Jawando in a performance from Tina – The Tina Turner Musical, Marcus Harman in a performance from Dear Evan Hansen, Sharan Phull in a performance from Everybody's Talking About Jamie, Collette Guitart and Hana Stewart who will alternate in a performance from SIX, Trevor Dion Nicholas in a performance from Hamilton, Dom Simpson and Tom Xander in a performance from The Book of Mormon, and Laura Pick in a performance from Wicked.
Furthermore, appearing are Tilly-Raye Bayer, Imogen Cole, Alyssa D'Souza, Alex Munden and Carly Thoms in a performance from the Royal Shakespeare Company's Matilda The Musical, Jordan Luke Gage in a performance from & Juliet, John Owen-Jones in a performance from Les Misérables, cast members in a performance from Disney's The Lion King, Christine Allado and Alexia Khadime in a performance from The Prince of Egypt, Alice Fearn in a performance from Come From Away, Lucy St Louis and Rhys Whitfield in a performance from The Phantom Of The Opera, Zizi Strallen in a performance from Mary Poppins and Mazz Murray in a performance from Mamma Mia!.