At the end of its technical meeting ahead of the World Cup finals which gets underway this week in Russia, FIFA announced that changes will be made to the way that the world rankings of global teams are calculated, switching to a method that add or subtracts points from a country's total rather than averaging them over a multi-year period.
Robbie's appearance will also see him joining forces with Russian soprano Aida Garifullina for a one-off duet.
"I'm so happy and excited to be going back to Russian Federation for such a unique performance", said Williams.
"I've done a lot in my career, and opening the FIFA World Cup to 80,000 football fans in the stadium and many millions all over the world is a boyhood dream".
The Opening Ceremony will be produced by Russia's Channel One and the "creative concept" will be developed by Felix Mikhailov, who has directed other World Cup events including the preliminary and main draw.
Diego Godin is the captain of Uruguay
One thing will remain the same, however: the underlying theme of celebrating not only football but also the host country, this time with a touching performance by one of Russia's most acclaimed young voices in Garifullina.
The opening ceremony will take place at Moscow's Luzhniki Stadium.
Brazil, favourites to win the World Cup for a record-extending sixth time in Russian Federation, are the best-supported nation outside of the hosts and the USA, with 72,512 tickets sold in that country.
Trump also assured that the U.S. would hold the tournament "in a similarly open and festive manner" as the 1996 and 2002 Olympic Games that the United States hosted, the Times reported.
Brazil looked shot to bits four years ago, but have recovered and are blessed with match-winners.