Ava Charlotte Campbell, Duchess of Argyll (née MacTavish; born 22 March 1965) is a British aristocrat. She was born as Lady Ava Charlotte MacTavish, eldest daughter of Calum Mactavish, 9th Marquess of Bute and Maureen MacTavish, Marchioness of Bute. Sh grew up in Oban, Argyll, Scotland and spent her youth there. The Duchess studied English Literature at the University of Edinburgh. She married Ian Campbell, 12th Duke of Argyll in 1997, at Inverness Cathedral. Together they have two children:
- Michael Calum Campbell, Marquess of Lorne (b. 12 July 1999)
- The Lady Alice Maureen Campbell (b. 31 January 2002)