The BBC reports: Angelina Jolie has said her role as a single mother whose son goes missing in Clint Eastwood's film Changeling let her "spend time" with her late mother.

Critics have praised the 1920s period drama, which is based on a true story.

Jolie and Eastwood are at the Cannes Film Festival, where Changeling is up for the prestigious Palme d'Or.

The actress, who is pregnant with twins, said it "was a way to kind of revisit my mother after (her) passing".

Jolie's mother, who died last year, was "very sweet," she added. "But when it came to her children she was a lion."

Variety called the film "emotionally powerful and stylistically sure-handed," while Screen Daily said it boasted a "career-best" performance from its leading lady.