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Published 20:57 2 Jun 2017 BST
Updated 22:43 2 Jun 2017 BST

Since playing the nasty principal in the blockbuster, the actress has gone on to have a number of roles starring in The Darling Buds of May, Call the Midwife, Rosemary & Thyme while also popping up in Harry Potter and the Prisoner of Azkaban and Gavin and Stacey.
Now, we know that Pam was in costume to play Miss Truchbull which resulted in a dramatic change of appearance but nonetheless, she still looks like a completely different person now.
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