Chart star Rebecca Ferguson is to share a stage with Alfie Boe and comics Alexander Armstrong and Ben Miller to raise funds for a Parkinson's disease charity at an event organised by a film and TV composer who has been diagnosed with the illness.
Other stars to appear at the Symfunny music and comedy evening in June - to be staged at London's Royal Albert Hall - include cellist Julian Lloyd Webber and comic Jason Manford.
The event for Parkinson's UK has been put together by James Morgan, who was shocked to be diagnosed last year in his early 40s, and his partner Juliette Pochin.
The pair have provided the music for shows on Channel 4 and Sky1 as well as the Billy Connolly movie Quartet, in addition to working with Boe and figures such as Katherine Jenkins.
Morgan said of his diagnosis: " This was a devastating blow for a 42-year-old with a young family and I was concerned that I would be stigmatised, pitied and overlooked. I'm overwhelmed by the support my friends and colleagues in the business have given me.
"This event has not only allowed me to prove that I'm still here and working, but also to use what I know best to raise awareness of this cruel condition and help others by raising vital funds to continue the research to find a cure."
Armstrong said: "It's going to be an unforgettable event and all for a cause that is close to many of us."