NBC says it’s working with Gabrielle Union after she lashed out at the network following her exit from “America’s Got Talent.”

Union reportedly complained to producers about a Korean joke made by guest star Jay Leno — and was distraught to get notes that her hair was “too black.”

Sources also said that show boss Simon Cowell wanted Union to come to him about her issues on set and not NBC.

Furious stars, including Ellen Pompeo, Ariana Grande, and Debra Messing came to her defense — as NBC insiders said they had no knowledge of some of Union’s complaints.

In a statement, NBC, alongside producers Freemantle and Syco, told Page Six: “We remain committed to ensuring a respectful workplace for all employees and take very seriously any questions about workplace culture.

“We are working with Ms. Union through her representatives to hear more about her concerns, following which we will take whatever next steps may be appropriate.”