Angelina Jolie looked relaxed in Sarajevo on Saturday

Angelina Jolie has displayed her impressive engagement ring from Brad Pitt at a public event for the first time.

The actress, 37, wore the giant emerald cut diamond band, which is thought to be worth $500,000, at the Sarajevo Film Festival in Bosnia and Herzegovina on Saturday.

Previously, Angelina had only given us a flash of it when she attended a private art viewing in LA earlier this year.

Brad, 48, worked with jeweller Robert Procop for over a year to ensure he created the perfect ring before he proposed to Angelina in April.

He's admitted in the past that their children Maddox, 10, Pax, 8, Zahara, 7, Shiloh, 6 and 3-year-old twins Knox and Vivienne had been keen for them to make the commitment.

'It is a promise for the future and their kids are very happy,' Brad's rep Cynthia Pett-Dante told Reuters at the time of the engagement.

'There's no date set at this time.'

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Anna Duff