Dame Maggie Smith, who plays the Dowager Countess of Grantham in ITV's costume drama, talks to Mark Lawson about why her character should be killed off, forgetting which film she's shooting on and why she was considered "too common" to appear in plays at school. This event, which was called Dame Maggie Smith in Conversation, was held as part of the BFI + Radio Times TV festival, which took place in April.

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