The star was due to appear alongside Red Dwarf co-stars Danny John-Jules, Robert Llewellyn and Hattie Hayridge.

Gex Trilogy is getting the voices of Danny John-Jules and Leslie Phillips added in via an update.

Travolta is no stranger to fan sing-alongs, as in 2019, he and Newton-John dressed up as their respective characters during a “Meet n’ Grease” sing-along event in Florida.

Meanwhile, Leslie Phillips voiced Gex as a smooth-talking spy, while Danny John-Jules just did his Cat voice from Red Dwarf.

John Travolta made a surprise appearance at Friday night’s “ Grease ” sing-a-long at the Hollywood Bowl dressed as his iconic drag racing, hip swinging 1950s bad boy Danny Zuko.

In an exclusive interview with PEOPLE, the 24-year-old DJ and model Xandra Pohl confirms her relationship status after ...

John Travolta surprised fans at the Hollywood Bowl Grease sing-along, reprising his iconic Danny Zuko role with a stylish blond wig ...

The Hollywood Bowl’s Grease sing-a-long event was automatic, systematic, hydromatic and grease lightning — thanks to a very special cameo from film star John Travolta. “Tonight at the ...

John Travolta had a surprise in store for fans who attended a “Grease” sing-along at the Hollywood Bowl, showing up in full Danny Zuko regalia — an unexpected nod to his character in the ...

John Travolta made a surprise appearance at Friday night’s “Grease” sing-a-long at the Hollywood Bowl dressed as his iconic drag racing, hip swinging 1950s bad boy Danny Zuko. “Tonight at ...

John Mayer was the mystery guest on the SiriusXM live recording of Jason Bateman, Will Arnett & Sean Hayes' 'SmartLess' podcast at Avalon Hollywood.