First on Obama's list is Britain's newly elected Prime Minister David Cameron.
This is the first meeting between the two leaders, which was by design.
"We wanted this to be the first bilateral meeting that the president would hold on this trip to underscore of course the special relationship between the United States and the United Kingdom," a senior administration official said. The two leaders are expected to discuss the global economy, Afghanistan, Iran, and Obama may get in a little good natured ribbing by bringing up the U.S.-England World Cup match week that ended in a draw.
Obama has cancelled two visits to Indonesia this year – first because of the health care vote in Congress and most recently because of the oil spill in the Gulf of Mexico. He will try and make amends with a private breakfast with Indonesia's Prime Minister.
"Regrettably [Obama] has both been able to make it to Indonesia yet," an administration official said of the two postponed trips, " but he very much wants to continue the close coordination that we have with Indonesia on a number of issues."
Security will be tight in Toronto this weekend. Protests have already begun and are expected to continue through Sunday.
The global leaders' summit has even upstaged baseball. The Toronto Blue Jays were scheduled to play three home games this weekend but because of security concerns and congestion, Major League Baseball moved the games to Philadelphia.