[5][3] Moseley attended Sheepscombe Primary School from September 1991 to July 1998, and then continued his education at Wycliffe College, also taking time off at Downfield Sixth Form, Stroud.

[8] Moseley reprised the role of Peter in the 2008 sequel, The Chronicles of Narnia: Prince Caspian,[3][9] which earned positive reviews from critics,[10][11] though it was not as commercially successful as its predecessor.

[12][13] For Prince Caspian, Moseley won Favorite Male Film Star from the Nickelodeon Kids' Choice Awards.

Moseley reprised the role of Peter a third time with a cameo in 2010's The Chronicles of Narnia: The Voyage of the Dawn Treader, despite the character's absence from the book of the same name.

[14] The Voyage of the Dawn Treader did not meet the same critical success as The Chronicles of Narnia's first two installments, although it did financially well in comparison to Prince Caspian.

[26] In 2018, Moseley appeared in the Australian biographical adventure film, In Like Flynn, alongside actors Corey William Large and Clive Standen.

[29] That same year, Moseley starred alongside Johanna Braddy in the independent film Saving Paradise, where he played the role of Michael Peterson, a Wall Street investment banker, directed by Jay Silverman and written by Van Billet.