Video has emerged of a teenage girl being forced to marry a man 20 years older than her in a Sydney mosque.

The 14-year-old, dressed in a light blue head scarf, can be seen in the a tiny room at the back of a suburban mosque preparing to wed a man she’s allegedly only known for only a few days.

“Sign here,” a man tells the groom as he looks at a document and the mother watches on and gives her full blessing.

The man had allegedly handed over $1480 gold necklace in exchange for his new bride.

7 NEWS EXCLUSIVE: Dozens of Australian child brides forced into illegal marriages

View photos It's alleged the girl's mother had given her blessing for the wedding. Photo: 7 News. More

View photos A court viewed footage of a wedding between a 34-year-old man and a child bride. Photo: 7 News. More

View photos A mother of a child bride had allegedly given her blessing for the wedding. Photo: 7 News. More

“… do you take… to be your wife?” a man asks.

The groom responds.

“Do you take… to live together and live according to Islam?” the teen is asked.

“Yes,” she responds.

The deal is done in minutes.

“As a wife you have a duty to obey your husband,” the man tells the newly wed bride.

The video highlights the startling reality surrounding child brides and their existence in Australia.

Family and Community Services minister Pru Goward said it was “deeply disturbing” to think of children in arranged marriages to grown men.

View photos Video played in court showed a wedding between a 34-year-old man and a 14-year-old child. Photo: 7 News. More

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