David Hunter and Lucie Jones will appear in concert together in April.
The stars of Waitress' West End production will appear alongside one another at Cadogan Hall.
Presented by Lambert Jackson Productions, the event will stream online on Sunday 18 April at 5PM.
A teaser for the show reads: "Join Waitress stars Lucie Jones and David Hunter for this one night only performance.
"Don’t miss this chance to see your favourite West End superstars and best buddies sing all your favourite theatre tunes (and originals), at the gorgeous Cadogan Hall.
"Join these two powerhouse talents in person with limited socially distanced seating or relax in the comfort of your own home with a live-streamed ticket.
"These two will wow you with their stunning vocals, beautiful arrangements and real-life friendship."