Check Out All Of The Harry Potter/Doctor Who Alums... Holy Cross Casting Batman!!!

I know that almost every single British actor/actress worth their weight in fish and chips appeared at some point in the Harry Potter film series. I am also aware that the BBC's longest running show Doctor Who is an absolute must guest starring role that British actors are looking to score. Since both franchises offer an immense amount of side characters as well as starring roles, one can only imagine that there would be some overlap. Click after the jump to see all of the 20 actors/actresses who have played a part in both the Potter-verse and Who-ville. Some you will remember, some you won't. All will bring a smile to your face. Thanks to my man Edson for the tip. Click after the jump for all the pics...

David Tennant as Barty Crouch & The Doctor

Michael Gambon as Dumbledore & Kazran/Elliot Sardick

Helen McCrory as Narcissa Malfoy & Rosanna Calvierri

John Cleese as Nearly Headless Nick & a nameless cameo

Zoe Wanamaker as Rolanda Hooch & Lady Cassandra

Jim Broadbent as Horace Slughorn & a future version of the 8th Doctor

Toby Jones as the voice of Dolby & The Dream Lord

Bill Nighy as Rufus Scrimgeour & the Vincent Van Gogh expert

Roger Lloyd Pack as Barty crouch Sr. & John Lumic

Shirley Henderson as Moaning Myrtle & Ursula Blake

Adrian Rawlins as James Potter & the Ood leader

David Bradley as Argus Filch & the voice of the Shansheeth

Derek Deadman as Tom the Innkeeper & Stor

Elizabeth Spriggs as the guardian of Gryfindor & random murder victim

Jeff Rawle as Amos Diggery & Plantagenet

Jessica Hynes as Mafilda Hopkirk & relatives of the Doctor

Jimmy Gardner as the Bus driver & Idmon

John Atterbury as Phineas Black & costme aleins from back in the day Doctor ho

Julian Glover as the voice of Aragog & Scaroth

Terence Bayler as The Bloody Baron & Yendom