Other acting credits include 54 (1998), The 10th Kingdom (2000), Helen of Troy (2003), Death on the Nile (2004), Jericho (2006), Moon Shot (2009), Zero Dark Thirty (2012), Black Mirror (2011 & 2017), Versailles (2015), Catastrophe (2015), The Durrells (2017), Upright (2019–2022), and Queen of Oz (2023).

Born in Sydney, New South Wales, to an Italian father and an Australian mother, Lapaine graduated from the National Institute of Dramatic Art (NIDA) in 1992.

He played the lead role in Pathe's The Abduction Club,[6] and Miramax's Elephant Juice, as well as memorable appearances in Brokedown Palace opposite Claire Danes and Kate Beckinsale.

Other television credits include Critical; Vexed; Lewis; Vera;[6] Identity; Hotel Babylon; Sex, the City and Me;[6] Jane Hall; The Good Housekeeping Guide; The Golden Hour;[6] Jericho;[6] and I Saw You.

[3] From 2019, He starred as Toby Flynn, working alongside Tim Minchin and Milly Alcock in the Australian comedy series Upright.

Other theatre credits include the parts of Trip in Other Desert Cities and Eilert Lovborg in Ibsen's Hedda Gabler at the Old Vic, opposite Sheridan Smith.

[11] He played Leontes in The Winter's Tale at the Sheffield Crucible;[10] Kurt in The Dance of Death at the Donmar Warehouse,[10] and at Trafalgar Studios, Chelsea.