Harry Potter's Miriam Margolyes Reveals Why She Turned Down Role in Marvel's 'Agatha' Series

17 Surprise Celebrity Cameos in the 'Harry Potter' Movie Franchise (Including an Oscar Winner & Three 'DWTS' Pros!)

Ben Shephard looks unrecognisable as he reveals his surprising role in Harry Potter as a long haired wizard

'Harry Potter' Star Miriam Margolyes Says Adult Fans Need to Grow Up