Set to play The Grey Lady, Kelly Macdonald was first asked to play another character

In a new interview with The Independent, the actress who will play The Grey Lady in Harry Potter and the Deathly Hallows – Part 2 reveals she was originally asked to play Tonks in Order of the Phoenix:

In her comfy knitwear and bright-orange trousers, the small, young-looking and low-key Macdonald looks more like a student than the woman who has quietly become one of the best actresses of her generation. She’s just finished shooting the part of the Grey Lady in Harry Potter and the Deathly Hallows Part 2. Unassuming as ever, she thinks director David Yates was doing her a favour “as he’s knocked me back a couple to times to play [the Order of the Phoenix member] Tonks in the Harry Potter films”.

Do you think The Grey Lady was the better choice? Or should she have played Tonks?