Apple Music Festival headliners rounded out with Mumford & Sons, Carrie Underwood and Ellie Goulding

Goulding will take the stage at London's Roundhouse on Sept. 19, with a special guest to be announced. Underwood will follow on Sept. 21, while Mumford & Sons will be joined by Jack Garratt on Sept. 27.

Apple also announced that both Lion Babe and NAO will join Disclosure's set on Sept. 25.

All 10 headline acts for the Apple Music Festival, formerly known as the iTunes Festival, have now been announced. Special guests still remain unknown for half of the acts, however.

Beats 1 will provide coverage of the festival when it kicks off later this month, while fans can follow a special Apple Music Festival page on Connect for lineup updates, announcements and behind-the-scenes photos and video.

Like the former iTunes Festival, Apple is handing out tickets through media partners in the UK, which this year includes the London Evening Standard. Those who can't make it in person can stream the festivities live via Apple Music or iTunes on iPhone, iPad, iPod touch, Mac and PC. Apple TV owners get direct access to high definition set replays, though there has been no word on live performances.

The full lineup follows:

• Sept. 19: Ellie Goulding, special guest to be announced
• Sept. 20: Take That, special guest to be announced
• Sept. 21: Carrie Underwood, special guest to be announced
• Sept. 22: One Direction, with Little Mix
• Sept. 23: The Weeknd, special guest to be announced
• Sept. 24: The Chemical Brothers, special guest to be announced
• Sept. 25: Disclosure, with NAO and Lion Babe
• Sept. 26: Pharrell Williams, with Leon Bridges
• Sept. 27: Mumford & Sons, with Jack Garratt
• Sept. 28: Florence + The Machine, with James Bay