Prince Harry, whose love for the continent is very well known, toured Africa between September and October last year with his wife Meghan Markle and their son Archie.
Prince Harry's appearance at the summit comes just hours after he delivered an emotional speech at an event held in honour of his charity, Sentebale.
The summit is bringing together business leaders, governments and international institutions, to showcase and promote the range and quality of investment opportunities for British businesses across the African continent.
The UK is looking to boost business trade with Africa, once it leaves the European Union at the end of January.
With only 11 months to come up with a trade deal with the European Union to avoid reverting to WTO rules, the "lion's share" of the UK's efforts will be aimed at getting the best deal possible with the EU, its closest and undoubtedly, its biggest trading partner.
Beyond that, deals with the US, China, South Korea and Australia are on the cards and likely to be prioritised, meaning that African countries will not be far up the list.
The UK is strengthening its economic partnerships with African nations, as part of a government drive to ensure the continent’s growing demand for investment is met by the UK’s expertise and innovation.
Programmes from the Department for International Development (DFID) and the Department for International Trade (DIT) will boost clean energy supplies, digital networks, jobs and business opportunities for women, as well as improving trade infrastructure.
Africa has eight of the world’s 15 fastest growing economies and there is huge demand on the continent for clean, sustainable and innovative investment.
As home to some of the world’s most enterprising technologies and the financial centre of the world in the city of London, the UK is perfectly placed to meet that demand and be the continent’s investment partner of choice.
The UK has signed trade agreements with 11 African countries, covering 43% of the UK’s total trade with Africa to date. It has also legislated for a trade preferences scheme with a further 35 African countries. The long-term plan is to build and strengthen existing agreements.