Suggestions by @isaacfilms

Tosin Cole

as Ryan in The Perfect Doctor Who Anniversary Special

Bradley Walsh

as Graham in The Perfect Doctor Who Anniversary Special

George Lazenby

as Cameos in Sammy j and Randy's Big Movie

Guillermo del Toro

as Producer in Batman Forever (2005)

Guillermo del Toro

as Producer in Batman and Robin (2007)

Isla Fisher

as Julie Madison in Batman and Robin (2007)

Ian McKellen

as Alfred Pennyworth in Batman and Robin (2007)

Tom Skerritt

as Commissioner Gordon in Batman and Robin (2007)

Chris Evans

as Robin in Batman Forever (2005)

Zac Efron

as Robin in Batman and Robin (2007)

Tim Curry

as Dr. Jason Woodrue in Batman and Robin (2007)

Hayley Atwell

as The Rani in Doctor Who: The Last Great Time War

Debbie Reynolds

as Gossip Gerty in Batman Forever (2005)

Bill Hader

as The Riddler in Batman Forever (2005)

Charlize Theron

as Dr. Chase Meridian in Batman Forever (2005)

Tom Skerritt

as Commissioner Gordon in Batman Forever (2005)

John Neville

as Alfred Pennyworth in Batman Forever (2005)

Ian McKellen

as Alfred Pennyworth in Batman Forever (2005)

Amy Jo Johnson

as Christine Daaé in The Phantom of the Opera (1994)

Emmy Rossum

as Actresses in Actors/Actresses who should collab with Christopher Nolan