Gerard McCarthy, Kevin Sacre, Loui Batley and Summer Strallen – who play Kris Fisher, Jake Dean, Sarah Barnes and Summer Shaw in the Chester-based soap – are in the process of rehearsing a string of T-Rex songs including the iconic 'Children of the Revolution' to mark the 30th anniversary of Marc Bolan's death.
Speaking of the forthcoming performance, McCarthy told Digital Spy: "I hope viewers are looking forward to the guys and girls of Hollyoaks performing and singing live for such a good cause.
"We're honoured to be singing songs from such a great artist alongside a host of established performers such as Spice Girls, Westlife and the Sugababes."
A source commented: "The guys had their first vocal session the other day with Children In Need's musical director. They'll be having their first choreography session at the end of the week and everything will soon come together."
Hollyoaks Producer Bryan Kirkwood added: "Hollyoaks is always happy to lend its help to good causes and Children In Need is about the best one there is. It's also a great opportunity to show that our cast aren't just actors but all-round performers."
Children In Need will air on Friday, November 17 on BBC One from 7pm.