Alex was born in Manchester on 19 September 1994.
In 2004 Alex took the starring role of Damian Cunningham in Millions, a family film directed by Danny Boyle.
He played the lead in his second film, Jay Russell's The Water Horse: Legend of the Deep. The film, based on a Dick King Smith story about a boy who adopts a monster sea creature, opened in North America on Christmas Day, 2007 and in other countries in early 2008. The film is set in Scotland during World War II, although all the scenes involving the creature itself were shot in New Zealand.
Alex also played the bright-eyed ragamuffin Harry Gregson in the six-part TV adaptation of Elizabeth Gaskell's Cranford for the BBC and WGBH, which was transmitted on BBC 1 in the autumn of 2007 and co-starred Philip Glenister, Judi Dench, Eileen Atkins and Imelda Staunton. He reprised his role in the two-part second series entitled Return to Cranford.
In 2008 Alex played Tolly in From Time to Time, an adaptation of The Chimneys of Green Knowe directed by Julian Fellowes. This film had its UK premiere in London in October 2009.
Most recently Alex starred in Ways to Live Forever a drama film by director Gustavo Ron based on the award winning novel of the same name written by Sally Nicholls.