Annabelle's maternal uncle was the late Richard Harris (who had an incredibly illustrious career, but is perhaps best known to younger generations for playing Dumbledore in the first two Harry Potter films). She is said to be close to her cousins Jared and Jamie (both actors) and Damien (a director). She told InStyle, "His son — my cousin — lives out in LA and has worked in the industry for years, so when I'm over there he'll have me round for roast dinners and give me advice on the people I'm meeting, even though it's way too hot for roast potatoes."