The Ghostbusters star, who is known for his love of sports, was spotted in the stands at the Amway Center in Orlando, Florida, heavily applauding the Xavier Musketeers as they faced off against the University of Maryland's Terrapins, who were the favourites to advance to the second round of the U.S. college basketball play-offs.

However, the Musketeers, whose assistant coach is Bill's son Luke, managed to pull off an upset, defeating their rivals 76 to 65, much to the actor's delight.

They will return to the same venue on Saturday (18Mar17) to go up against the Florida State Seminoles in the NCAA Tournament.

Luke Murray is Bill's second child with his first wife Margaret Kelly, who he was married to from 1981 to 1996. They are also parents to another son, named Homer, while the 66-year-old has four other boys with costume designer Jennifer Butler, who he divorced in 2008 after 11 years of marriage.

Bill isn't the only celebrity parent to get emotional during the start of the so-called March Madness season. Seinfeld star Julia Louis-Dreyfus also celebrated on Thursday as her sports ace son Charlie Hall helped lead her alma mater, Northwestern University, to the second round. The Northwestern Wildcats beat the Vanderbilt Commodores 68 to 66, earning them a place against the Gonzaga Bulldogs in Salt Lake City, Utah on Saturday.