Season 12 Semifinals

The Semifinals of Season 12 of America's Got Talent aired from September 5, 2017 to September 13, 2017. A total of 22 acts performed. 10 acts proceeded to the Finals, and 12 acts were eliminated.
 * Italics indicate that the act was either chosen to move on or eliminated in the Judges' Choice, which means they finished in either 5th or 6th in America's Vote.

Process
11 acts performed each week over two weeks. Each week, 5 acts moved onto the Finals.

Week 1
Main articles: Episode 1217 and Episode 1218

Week 2
Main articles: Episode 1219 and Episode 1220

Performing: (1/11)
 * Angelica Hale, Singer

Upcoming Acts

 * Billy & Emily England, Extreme Rollerblade Duo
 * Celine Tam, Singer
 * Christian Guardino, Singer
 * Darci Lynne, Singing Ventriloquist
 * Eric Jones, Magician
 * Evie Clair, Singer/Pianist
 * In The Stairwell, A Cappella Group
 * Johnny Manuel, Singer
 * Light Balance, Light-Up Dance Crew
 * Mandy Harvey, Singer/Ukulelist
 * Merrick Hanna, Dancer
 * Preacher Lawson, Stand-up Comedian
 * Yoli Mayor, Singer