David Fynn is a British-Irish actor, producer and screenwriter, he received a nomination for the Olivier Award for Best Actor in a Musical in 2017, playing Dewey Finn in School of Rock. He is most notable for playing Brett in the NBC TV sitcom Undateable (2014–2016).
Other credits include Spooks (2006), The Inbetweeners (2009), Peep Show (2010), Doctor Who (2010), Black Mirror (2011), Life’s Too Short (2011), Pete versus Life (2011), Game of Thrones (2012), Big Bad World (2013), Mayday (2013), Sherlock (2014), The Job Lot (2014), Banana (2015), The Pembrokeshire Murders (2021), The Thief, His Wife and the Canoe (2022), and Am I Being Unreasonable? (2022-2025).
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Theatre
His theatre credits include She Stoops to Conquer at the National Theatre, (Evening Standard Nomination), Romeo and Juliet at the National Theatre, The 25th Annual Putnam County Spelling Bee at the Donmar Warehouse, Mojo at the Royal Shakespeare Company, After the Party in the West End, and Starving at Theatre503. He trained at the Webber Douglas Academy of Dramatic Art.
He began playing Dewey Finn in the West End cast of Andrew Lloyd Webber's musical School of Rock (based on the 2003 film with Jack Black) in October 2016 at the New London Theatre, for which he received a nomination for the Olivier Award for Best Actor in a Musical in 2017. In 2026, he began playing the main role in Beetlejuice (musical) at the Prince Edward Theatre.
Television
He made his television debut in 2006 in Spooks. include The Inbetweeners (2009), Peep Show (2010), Doctor Who (2010), Black Mirror (2011), Life’s Too Short (2011), Pete versus Life (2011), Game of Thrones (2012), Big Bad World (2013), Mayday (2013), Sherlock (2014), The Job Lot (2014), and Banana (2015).
He is most notable for playing Brett in 36 episodes of the NBC TV sitcom Undateable (2014–2016). He starred alongside Olivia Cooke and Anthony Head in the historical drama miniseries Vanity Fair (2018).
In January 2021, he appeared as one of the lead characters, journalist Jonathan Hill, in the ITV miniseries The Pembrokeshire Murders (2021). In 2022, he played the part of a journalist in ITV's The Thief, His Wife and the Canoe (2022), and Alex in the BBC's Am I Being Unreasonable? (2022-2025).
