George MacKay was born in 1992 in Hammersmith, London, England, to Kim Baker, a British costume designer, and Paul Christopher MacKay, an Australian stage/lighting manager, from Adelaide. One of his grandmothers is from Cork, Ireland.
At the age of ten, George was scouted to audition for a role in the family feature
Peter Pan (2003). He quickly landed the part of Curly, one of the Lost Boys, and went on to have several minor roles on TV, including an episode of
Rose and Maloney (2002) and
Footprints in the Snow (2005). At thirteen, George landed the part of Riccio in the film adaptation of Cornelia Funke's best-selling children's novel
The Thief Lord (2006), starring
Aaron Taylor-Johnson and was also cast in lead role for the BBC adaptation of Terry Pratchett's
Johnny and the Bomb (2006).
George worked with
Tim Roth,
Chiwetel Ejiofor and
Sophie Okonedo for the HBO Movie
Tsunami: The Aftermath (2006) and later took a part in the Dickensian drama
The Old Curiosity Shop (2007). Soon after, George co-starred with
Daniel Craig and
Liev Schreiber on
Defiance (2008). In 2009, George took on the role of Harry, in
The Boys Are Back (2009) alongside
Clive Owen, for which he received two award nominations. His career took another step forward with
Hunky Dory (2011).
Since then, George featured in several shorts that have been popular on the festival circuit and played the part of Tommo Peaceful with counterpart
Jack O'Connell in the adaptation of
Michael Morpurgo's
Private Peaceful (2012).
2013 was George's breakthrough year, and he was recognized for his parts as Aaron in
For Those in Peril (2013), Davy in the musical
Sunshine on Leith (2013), Jake Whittam in
Breakfast with Jonny Wilkinson (2013), and the dark horse Eddie in
How I Live Now (2013). George received several nominations for such features and later bought home a total of five awards.
George had a stint in the West End in 2014 in The Cement Garden. He portrayed Joe in the well-received
Pride (2014) and
Duane Hopkins'
Bypass (2014) premiered at the BFI London Film Festival in October. Both Captain Fantastic and
Sadie Jones'
The Outcast (2015) are in post-production and George will be returning to theatre for Eugene O'Neill's '"Ah,Wilderness!" this April.
In 2016, George starred in the film
Captain Fantastic (2016), opposite
Viggo Mortensen, and the mini-series
11.22.63 (2016), with
James Franco and
Sarah Gadon. He rounded out the decade playing the starring role in Sam Mendes'
1917 (2019), a box office hit and highly critically acclaimed drama set during World War I, and shot to simulate a single take in real time.