NEW YORK (AP) — NBC’s veteran Lester Holt is stepping down as anchor of the network’s flagship “Nightly News” broadcast in the coming months.

Holt, who has been the face of “Nightly News” for a decade, won’t be leaving NBC altogether, however. In a memo to staff Monday, he said he would be expanding his work on NBC’s “Dateline,” taking on a full-time role.

The transition is expected to take place early this summer. No firm date or successor for “NBC Nightly News” has been named yet.

“It has truly been the honor of a lifetime to work with each of you every day, keeping journalism as our true north and our viewers at the center of everything we do,” Holt wrote in his note thanking colleagues. “A smile comes to my face when I think that with Nightly News, and Dateline, I have now anchored two of the most successful and iconic television news programs in broadcast history.”

Janelle Rodriguez, executive vice president of NBC News Programming, applauded Holt’s legacy at “Nightly News” and reiterated that the anchor will stay at NBC “for years to come.”

Holt, 65, joined NBC back in 2000. He became the permanent anchor of “Nightly News” in June 2015 — replacing Brian Williams after anchoring weekend editions of the show for eight years. And he has been the principal anchor of “Dateline” since September 2011.