As the WAGs of the golfing world come out to cheer on their men in the famous sporting event in Chicago over the coming days, 23-year-old McIlroy will take to the course without his Danish partner watching on.
Meanwhile, fellow Irish player Graeme McDowell -- and vice captains Darren Clarke and Paul McGinley -- have been joined by their partners: American interior designer Kristin Stape, newlywed Alison Clarke and Allison McGinley.
Other partners including Diane Donald, Kate Rose, Laurae Westwood, Pernilla Bjorn, Katie Poulter and Sanna Hanson will wear the European colours for the weekend.
The women of both the US and European teams relaxed at their hotel while the players enjoyed a practice round yesterday, ahead of this afternoon's competition opener.
A number of Hollywood celebrities have also been showing off their skills on the greens of the Medinah Country Golf Club this week.
Although she did not play, Timberlake's fiance, 'Total Recall' actress Jessica Biel, watched on from the crowd.