The law graduate was born in Cape Town in 1983 and grew up in Port Elizabeth. Her father, Barry Steenkamp, is a high profile horse trainer within the country.
The model became the face of Avon cosmetics in South Africa after moving to Johannesburg, having previously fronted campaigns for FHM, Toyota, Clover and Italian brand Zui.
Her Facebook account said she had a "passion for cars and cooking."
More top news
A team of detectives and specialists is set to begin a painstaking excavation of the area where Ben is thought to have gone missing in 1991.
The foreign secretary's suggestion last week's bombing of an aid convoy might constitute a war crime prompted an angry response from Moscow.
Goals from Charlie Austin, Dusan Tadic and James Ward-Prowse consigned Slaven Bilic's men to their fourth straight Premier League loss.