Lester Holt, the anchor and managing editor of “NBC Nightly News” for a decade, announced that he is stepping down from the long-running broadcast at the beginning of the summer. NBC News did not immediately name Holt’s successor.

The newscaster will continue his full-time role as the lead anchor of NBC's "Dateline." Seasoned NBC journalist Lester Holt has announced that he is stepping down as the anchor of NBC Nightly News, joining a growing list of newscasters who are parting ways with NBC amid network shakeups.

Holt has been a calming presence at NBC News, where his unflappable and low-key demeanor helped the news division move forward after a period of tumult. He took over “Nightly” duties after his predecessor, Brian Williams, was removed following scrutiny of claims the latter made about the details of a reporting trip to Iraq.