Chloe Moretz was spotted on Wednesday arriving at the Los Angeles airport on crutches.

The 17-year-old sported a knee brace as her elder brother Trevor gave her a helping hand as they left the terminal.

Although Chloe has not stated publicly how she injured her leg, speculation has pointed to stunt-work on her current film project, The Fifth Wave.

Scroll down for video

Ouch: Chloe Grace Moretz arrived on crutches as she passed through the LAX airport on Wednesday

An action-filled science-fiction drama, Chloe has the lead role of Cassie Sullivan in this adaptation of a popular young-adult novel and therefore could face many stunts.

Chloe kept things casual for travel with an injury, with grey skinny jeans worn under the black brace supporting the girl's right knee.

A loose, grey-and-black-striped T-shirt and black trainers completed Chloe's outfit.

Family support: Chloe fortunately didn't have to travel alone with her brother Trevor there to help her along

The actress even kept accessories to a minimum - a cross necklace, round sunglasses by Quay Australia, a grey shoulder bag, and the crutches were all she brought with her.

Trevor - a 28-year-old actor, producer, and manager for his little sister - went for a very similar style.

A grey T-shirt was visible under a black leather jacket, the tops worn with black skinny jeans and trainers.

Casual-wear required: With a knee brace and crutches, Chloe's casual T-shirt and jeans may have been more of a requirement than a choice

He carried both a bag over his shoulder and a computer case in his arms.

The injury may not have been too serious, as Chloe kept a smile on her face as she made her way through the airport.

Work injury? Chloe has not explained how she hurt her knee but is currently filming the possibly stunt-heavy movie, The Fifth Wave

Considering how busy her career has been over the past few years, a quick recovery would be a definite cause for happiness.

In 2014 alone, Chloe had major roles in four movies - If I Stay, The Equalizer, Clouds Of Sils Maria, and Laggies - plus a cameo in Muppets Most Wanted.