Suggestions by @jdfitzgerald

Maxey Whitehead

as Madge in Thomas the tank engine & Friends welcome to Island of sodor.

Jane Horrocks

as Madge in Thomas the tank engine & Friends welcome to Island of sodor.

John DiMaggio

as Cranky in Thomas the tank engine & Friends welcome to Island of sodor.

Jim Carrey

as Cranky in Thomas the tank engine & Friends welcome to Island of sodor.

Colin Firth

as Toad in Thomas the tank engine & Friends welcome to Island of sodor.

Carrie Savage

as Annie and clarabel in Thomas the tank engine & Friends welcome to Island of sodor.

Emma Thompson

as Annie and clarabel in Thomas the tank engine & Friends welcome to Island of sodor.

Sally Hawkins

as Henrietta in Thomas the tank engine & Friends welcome to Island of sodor.

Luci Christian

as Henrietta in Thomas the tank engine & Friends welcome to Island of sodor.

Shannon Emerick

as Caroline in Thomas the tank engine & Friends welcome to Island of sodor.

Kylie Minogue

as Caroline in Thomas the tank engine & Friends welcome to Island of sodor.

Ian McKellen

as Duke in Thomas the tank engine & Friends welcome to Island of sodor.

Bryce Papenbrook

as Sir Handel in Thomas the tank engine & Friends welcome to Island of sodor.

John Swasey

as Rheneas in Thomas the tank engine & Friends welcome to Island of sodor.

Ernesto Jason Liebrecht

as Skarloey in Thomas the tank engine & Friends welcome to Island of sodor.

Johnny Yong Bosch

as Peter Sam in Thomas the tank engine & Friends welcome to Island of sodor.

Peter Anderson

as Duncan in Thomas the tank engine & Friends welcome to Island of sodor.

John DiMaggio

as Duncan in Thomas the tank engine & Friends welcome to Island of sodor.

Craig Ferguson

as Duncan in Thomas the tank engine & Friends welcome to Island of sodor.

Will Poulter

as Rusty in Thomas the tank engine & Friends welcome to Island of sodor.