By Joe Flint

NBCUniversal has overhauled its television-production units under Pearlena Igbokwe, a fast-rising executive who has been promoted to chairman, Universal Studio Group, the company said Wednesday.

The move puts Ms. Igbokwe over NBCUniversal's various content production arms, an important role as the unit is relied upon to develop content for the company's various platforms including the NBC broadcast network, cable channels such as USA and Bravo and the new streaming service Peacock. She will report to NBCUniversal Chief Executive Jeff Shell.

"Our television studios are key growth engines for the company, and Pearlena is ideally suited to lead them. She has extraordinary taste and is well-respected within NBCU, and throughout the global creative community," Mr. Shell said.

Bonnie Hammer, a veteran executive who had been chairman of the unit, has been named vice chairman of NBCUniversal and will serve as an advisor to the company's entertainment operations, also reporting to Mr. Shell.

The moves are part of an ongoing realignment at the Comcast Corp.-owned entertainment company under Mr. Shell who succeeded Steve Burke as chief executive earlier this year. Mr. Shell has pushed to streamline much of its operations and reduce redundancies throughout the company.

Write to Joe Flint at joe.flint@wsj.com