In fact, the 49-year-old reality star says she sets her dance students up for success.
"I create stars," she told ET. "I have had kids in 17 to 18 different Broadway shows, so it's what I do. [I] make these professional, working, employable dancers who can go out and get a job, and I pride myself on that."
Miller appears to be taking Ziegler's departure in stride, referring to her as one of the many students she's helped. "I've taken so many kids out of Pittsburgh and onto the great white way in New York City right into a Broadway show," she said. "Right here in Los Angeles, I have kids working in different television shows, in the movies, everything. So, [Ziegler’s] just another one of those kids I think I've proven my talent with."
Nonetheless, Miller remains "very proud" of her famous student, who is leaving the Lifetime reality show after six seasons to act in a movie directed by Sia and appear as a judge on So You Think You Can Dance.
Watch Ziegler spill the beans on the real Sia -- who she's worked with on a number of projects, including music videos -- in the clip below