Woody Harrelson told Hunger Games star Jennifer Lawrence to give her Oscar back each time she forgot her lines on the set of sequel Catching Fire, according to the pair's fellow cast-members.

Since filming last year's blockbuster dystopian action movie the 23-year-old star has picked up the Academy Award for best actress for her work in the acclaimed David O Russell comedy drama Silver Linings Playbook and risen to the top of the Hollywood A-list. Speaking at a press conference in London ahead of tonight's world premiere in Leicester Square, co-star Josh Hutcherson revealed Lawrence had not picked up any additional airs and graces, though her new-found fame had made her the butt of most of the on-set jokes.

"She didn't bring her Oscar with her," said Hutcherson, who plays Peeta Mellark in Francis Lawrence's film. "I'm curious to know who brings their Oscar on set. But every time she would forget a line, Woody would go: 'Oh, better give that Oscar back!'

"She was already a pretty big target, but after the Oscar she was an even bigger target. But no, she didn't change at all."

Jeffrey Wright, who plays new character Beetee, revealed his attempt to play a practical joke on Lawrence backfired in devastating fashion. "When Jennifer won the Oscar I gave her a gift of a Liberty box, filled with 200 crickets. What I didn't calculate was that when you fill a box with 200 crickets, many of them spill out in your hotel room, and hop under your bed and behind your dresser. So I couldn't sleep for about a week with the sound of these crickets."

For her part, Lawrence praised her family for making huge financial sacrifices to help her career in the early days.

"I wouldn't be here without my parents, who took out a second mortgage to let me do this," she said. "My brothers told them 'let me go' and I lived without parents for a couple of years. They are my rock. They are always there."

She added: "I love this movie so much and I'm excited for everyone to see it."

Also starring Jena Malone, Liam Hemsworth, Lenny Kravitz, Elizabeth Banks, Stanley Tucci, Donald Sutherland, Toby Jones and Willow Shields, The Hunger Games: Catching Fire continues the story of Katniss Everdeen in the wake of her victory in the original Hunger Games. With the cruel rulers of the future nation of Panem fighting the first stirrings of rebellion, Katniss and Peeta find themselves plunged back into a new and very different Hunger Games arena.

The sequel is being tipped to be one of the year's highest-grossing movies.

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