Hanna Mangan-Lawrence (born 5 March 1991 in London, England) is an Australian and British actress, best known in Australia for her role as Holly in the drama series Bed of Roses in which she received an AFI Award nomination in 2008 and a Logie Award nomination in 2009, and internationally as Seppia in the Starz historical drama Spartacus: Vengeance.

Mangan-Lawrence started her film career in 2005 with the short films, Simulation 1201 and Galore. This was followed by a starring role as Georgie, in the short film Sexy Thing, which was accepted into the Cannes Film Festival.