Apparently, no one in the band had actually heard the single by the 23-year-old singer till the day of its release (April 7), reported Billboard.
"I haven't played it for many people, I've kept it very close to my chest. It's amazing to watch your friends put music out in the world and everyone so far has done amazing," Styles said in a radio interview with SiriusXM.
The singer also talked about being in touch with other bandmates, including Louis Tomlinson and Liam Payne after they embraced fatherhood.