Mosely was born on April 27, 1987, in the countryside of Gloucestershire, England, growing up in a 400-year-old house in an idyllic town. Because the Sheepscombe Primary School he attended did not have any sort of drama program, the rambunctious and entertaining Moseley had no official outlet for his performing tendencies until he was 10 years old, when his classroom was visited by a casting agent scouring schools to cast for the sleeper movie, “Billy Elliot” (2000). Moseley’s energy and improvisations delighted casting directors who did not have an appropriate role for him, but did fix him up with an agent. Over the next five years, the ambitious child actor auditioned plenty, but had only landed a few small roles in TV productions like “Goodbye Mr. Chips” (ITV, 2002). When his agent got news of auditions for “The Lion, the Witch, and the Wardrobe,” she almost kept it from Moseley for fear that another rejection would crush his high hopes. But after 18 grueling months of readings and screen tests for the role, Moseley was chosen from a pool of 3,000 to portray Peter Pevensie.
Moseley enjoyed months of training to play his character – the eldest of three siblings who discover a fantasy world of good and evil hidden in the back of a closet. Eschewing a stunt double, the adventure-seeking teen gladly learned the trick riding, swordplay and kickboxing skills the courageous older brother possesses, who, along with his siblings, fight the forces of the White Witch who is holding Narnia under a perpetual grip of winter. The film was a runaway hit, resulting in Moseley’s calendar booking up for the next few years as Disney rolled out deals for first two sequels.
At the beginning of 2007, following several months of drama training in New York, Moseley returned to the Narnia set in New Zealand and began production on the second film in the series, “Prince Caspian.” A deal was inked in spring of 2007 for a third installment, “The Voyage of the Dawn Treader,” also to star Moseley and to be directed by Michael Apted for release in spring of 2009.