A man's mistress causes mayhem after gatecrashing his wedding day dressed as a bride

A video of a man's mistress showing up at his wedding day in a full bridal gown has gone viral.

The incident appears to have taken place in South Africa where a man in a tux can be desperately seen trying to calm down a woman in a wedding dress, while the woman who appears to be set to marry, looks on bemused.

The chaotic scene is soundtracked by guests who are either screaming or shouting, with others taking pictures or recording video on their phones.

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Twitter user @nkokhi shared the clip in June 2018, where it soon went viral picking up more than 700,000 views and 6,000 retweets at the time of writing.

It's unclear where and when the video was actually filmed and what happened next, but the mistress appears to be trying to tell the bride what the man she is about to marry is really like.

At one point, a bridesmaid in a bright pink dress does try to separate the mistress from the groom but is unsuccessful in her attempts.

Comments on the video range from shock, hilarity and questions about what someone would do if faced with a similar situation.

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