Actress was helped by Alexander Skarsgard when her dress came undone on the red carpet

MARGOT Robbie narrowly avoided an embarrassing wardrobe malfunction at the Tarzan premiere last night when her dress came undone on the red carpet.

The blonde beauty was joined by stars including Zara Holland for the glitzy London screening, but needed help from hunky Alexander Skarsgard when her gown unzipped.Alexander stepped in to help Margot with her dressCredit: PA:Press Association

Alexander was on hand to help his Tarzan co-starCredit: Getty Images – WireImage

Margot looked shocked on the red carpetCredit: Rex Features

Former Love Island star Zara wowed the crowds in a 𝑠e𝑥y dressCredit: Justin Goff/GoffPhotos.com

Castmembers including Margot and Alexander turned out for the screening of the re-imagined version of the classic tale.

They were joined on the red carpet by stars including Love Island’s Zara, who wowed the crowds in a daring dress.

The former Miss GB, who was stripped of her title after she had 𝑠e𝑥 with a fellow contestant on the raunchy show, looked amazing in the low-cut gown.

The beauty queen flashed her thighs in the revealing frockCredit: Array

The dress appeared to consist of sheer fabric draped over a black bodysuitCredit: Justin Goff/GoffPhotos.com

However, all eyes were on the film’s star Margot, 26, as she suffered an embarrassing moment on the red carpet.

Her dress appeared to come undone, and her gallant co-star Alexander stepped in to help out.

He was pictured helping her do up the back of the gown as Margot smiled appreciatively.

Alexander was the perfect gentleman when he realised his co-star was in troubleCredit: Karwai Tang

She also had to bend down to fix her dress when it apparently became caught on her shoesCredit: Karwai Tang

However, it was not the only near-miss for Margot as another picture shows her bending down to fix her frock after the train appeared to become snagged on her high-heeled shoes.

The co-stars laughed and joked together on the red carpetCredit: PA:Press Association

The former Neighbours actress looked stunning in her designer gown