Hunger Games and X Men have helped make Jennifer Lawrence the year's most valuable star.

She's topped the Forbes list of the highest-grossing actors of 2014.

US correspondent Robert Penfold says it's a major achievement for the 24-year-old.

"Throughout the year, Jennifer Lawrence's films brought in 1.4 billion dollars.

Chris Platt came in at number two, ahead of Scarlett Johanson in third on the list.