William Brent Unger is an American actor. He is known for playing Chase on the Disney XD series Lab Rats and Lab Rats: Elite Force. Credited as Billy Unger before 2016, starting with Lab Rats: Elite Force, he is credited as William Brent.

Lab Rats: Elite Force is an American comedy television series created by Chris Peterson and Bryan Moore that aired on Disney XD from March 2 to October 22, 2016. The series is a combined spinoff of Lab Rats and Mighty Med and stars William Brent, Bradley Steven Perry, Jake Short, Paris Berelc, and Kelli Berglund.