He sent fans into meltdown after he was spotted in the St. Peter's Square on Thursday night after the new pope was announced.
The Grammy-award winning artist, 31, was seen in the crowd as Pope Leo XIV delivered his first public remarks in his new position.
The singer, 31, teamed the retro style red Adidas shorts with a graphic printed white sweater for his outing.
Harry Styles was spotted listening to music through a pair of wired headphones while out and about in central London on Thursday afternoon.
The singer, 31, and comedian, 46, struck up a friendship after the former One Direction member shot to fame on X Factor in 2010.
Harry Styles bagged an impressive time during the Tokyo Marathon on Sunday as he joined fellow runners taking part in the 26.2mile race.