Phoebe Jane Elizabeth Tonkin (born 12 July 1989) is an Australian actress. Born and raised in Sydney, she began her career on Australian television and had her breakthrough playing Cleo Sertori in the Network Ten fantasy series H2O: Just Add Water (2006–2010), for which she received acclaim and was nominated for the AACTA Award for Best Actress. Tonkin made her film debut as Fiona Maxwell in Stuart Beattie's apocalyptic war film Tomorrow, When the War Began (2010). After starring in the horror film Bait 3D (2012), she relocated to America, where she received acclaim for her roles as Faye Chamberlain in the CW supernatural drama series The Secret Circle (2011–2012) and Hayley Marshall in The Vampire Diaries (2012–2013) and The Originals (2013–2018).
Tonkin directed the short film Furlough (2016), starred in the Emmy-winning SBS thriller miniseries Safe Harbour (2018) and the Stan science fiction drama series Bloom (2019–2020), and appeared in Damien Chazelle's film Babylon (2022). She gained a critical resurgence for starring as a struggling, drug addicted mother in the Netflix miniseries Boy Swallows Universe (2024), based off Trent Dalton's semi-autobiographical novel of the same name.
