As if we didn't love Jennifer Lawrence enough already, the star of The Hunger Games has shown she's game for a laugh again in an hilarious appearance on US telly.

The 23-year-old star joined Jimmy Fallon on The Tonight Show for a game entitled "Box Of Lies" - which saw the pair attempting to bluff one another at a specially constructed desk.

Kicking off the contest, J-Law brought the house down by quipping: "Inside my box is a very curious thing... and it's not the first time I've said that."

This caused Fallon to dissolve into helpless laughter with his head on the desk.

The first box contained a Rubik's Cube in jelly - and J-Law harnessed her Oscar-winning acting skills to conjure up a poker face that convinces host Fallon she is lying.

Fallon then described a Backstreet Boys action figure from his box.

"If it's not the truth you're a sociopath," she declared - and then added in her defence: "If I'm gonna lose I wanna make you feel bad about it."

He revealed that it was indeed a lie. They then headed into a tie-breaker which saw J-Law extract what appeared to be a spring roll in a bird's nest from a box.

However she told Fallon it was "a miniature horse on a bed of Flintstone vitamins".

Unsurprisingly he correctly guessed it's a lie and thus won the contest.

J-Law recently brushed off her FHM "sexiest woman in the world" title.