The drawings of the characters during the end credits are the exact drawings that appeared in the book. This is a tribute to Pauline Baynes, the series' illustrator, who passed away on August 2, 2008, at 85.
When Susan writes from America, a picture of the Pevensies rests on the table before her. This is a candid behind-the-scenes shot of the four actors from the previous film, The Chronicles of Narnia: Prince Caspian (2008).
Skandar Keynes' last film before he quit acting.
Michael Apted chose to remove Prince Caspian's Spanish accent, as he didn't like it, and it didn't do the character service.
After The Chronicles of Narnia: Prince Caspian (2008) did not fare as well as expected at the box office, the Walt Disney Company decided for budgetary and logistical reasons not to co-produce and co-finance this, or any of the following chapters of the Narnia series. Ironically, they would eventually own the film by acquiring Twentieth Century Fox.