Prince Harry will seal the deal in his romance with girlfriend Cressida Bonas in a meeting with her family at a wedding in South Africa.

According to the Daily Mail, the 28-year-old prince has been invited to attend a lavish nuptials of Bonas' half-sister Isabella Anstruther-Gough-Calthorpe, to business mogul Richard Branson's son, Sam, at his private game reserve near the Kruger National Park in two weeks.

The third-in-line prince was recently spotted kissing and cuddling his socialite/model girlfriend at a Swiss ski resort, where they were also joined by Princess Eugenie and Princess Beatrice, Prince Andrew and Sarah Ferguson.

In the photos, Prince Harry had his arms wrapped around Cressida on the slopes in front of dozens of other skiers.

Sources say the couple partied until the early hours in a private booth at the Casbah nightclub afterwards, barely able to keep their hands off each other.

After partying until 3.30am on Tuesday a shirtless - and apparently very drunk - Harry climbed through a small rear window in order to avoid waiting photographers spotting him with his girlfriend.

Cressida is the daughter of businessman Jeffrey Bonas and Sixties model Lady Mary Curzon.

She was first seen with Prince Harry in May 2012 after he had attended the Dark Knight Rises premiere.

Here are five things you need to know about Cressida:

1. Cressida and Harry first started casually dating in May 2012. She backed off after Harry was photographed partying naked in Las Vegas.

2. Early in their relationship, the couple traveled to Necker Island to celebrate Sam Branson's birthday. Sam, son of Sir Richard Branson, is engaged to Cressida's sister, Isabella Gough-Calthorpe, a British movie star.

3. Her parents are divorced. Her father is Jeffrey Bonas, a business man. Her mother, Lady Mary-Gaye Curzon, has five children with four different fathers.

4. She is an accomplished dancer and is currently studying dance at the Trinity Laban Conservatoire of Music and Dance.

5. Her fashion style is hippy-inspired, and she'd rather wear sneakers than high heels.