Tournament matches will take place at 11 venues across the country, taking teams as far east as Ekaterinburg and as far south as Sochi.
Federation Internationale de Football Association says the opening ceremony will take place much closer to kick-off than usual, just 30 minutes before the start of the opening match.
The event, kicking off June 14, will take place in various cities across Russian Federation, from Moscow to St. Petersburg to Sochi.
Williams said he was "happy and excited" about the "unique performance" in front of 80,000 fans and many millions all over the world and that it was a boyhood dream.
The "Angels" icon will perform to a crowd of 80,000 people at Moscow's Luzhniki Stadium on Thursday, shortly before the opening game between Russian Federation and Saudi Arabia.
Diego Godin is the captain of Uruguay
Russian Federation built on its reputation for lavish spending on sporting events, investing billions of dollars into preparations for the 2018 World Cup, the worldwide soccer tournament that will feature 32 teams playing in 11 cities across the country this month.
Shaikh Khalifa took part in a meeting of heads of continent's federation chaired by the FIFA chief Gianni Infantino.
Fox Sports has the exclusive broadcasting rights to this year's World Cup, meaning you can catch the matches on Fox, Fox Sports 1, FoxSports.com and via the Fox Sports GO app.
Jose Mourinho has revealed the four teams he believes will reach the semi-finals of the World Cup.
The New York Times reviewed the letters and first reported on them.