The musician pulled double duty as the host and musical guest and slayed in both roles.
The former One Direction singer showed off his comedy chops with a musical monologue.
'Fine Line' will debut Dec. 13!
The former boy bander announced the news on Twitter on Thursday.
The 'Bombshell' co-stars appear on Tuesday's 'Ellen' where they discuss Theron's celebrity prospects.
The racy music video features the singer in a crowd of scantily dressed men and women.
The former One Direction member opened up about that graphic scene in a new interview with 'The Guardian.'
The HBO show featured the former boy banders in an animated fan fiction sequence that got graphic.
The crooner also discusses his love of acting in the new interview.
Another rising star is up for the role!
The 'Sign of the Times' singer debuted a new look over the weekend and fans had a lot of feelings about it.
The singer opens up like never before in the September issue of 'Rolling Stone.'
Harry Styles is opening up about his new music and navigating being a solo artist in a rare interview.
The sexy cover features a shirtless Styles beaming as he smiles into the camera with his tattooed torso on display.
