Heidi Gutman/ABC News David Muir is the anchor and managing editor of ABC World News Tonight with David Muir, the most-watched newscast in the U.S., and co-anchor of ABC’s 20/20. Muir’s ...

David Muir was spotted in a small community near the Orlando, Fla., area. So why is he in Orlando? Here's what we know.

Fellow longtime anchor David Muir was among the many journalists who shared their surprise with messages bidding Lester farewell (he will be moving to a full-time position on Dateline).

David Muir and George Stephanopoulos have reportedly been at odds for months, over their seniority at ABC news.

Lester Holt's ratings rival David Muir has paid tribute to the outgoing NBC Nightly News anchor in a glowing tribute post. The host of ABC World News Tonight penned the homage Monday ...

In a new "20/20" episode, "The Code Breakers," airing March 7 at 9 p.m. ET on ABC, and streaming the next day on Hulu, David Muir explores the innovative DNA technology Othram used to crack the ...

ABC's World News Tonight anchor David Muir shared a message celebrating NBC anchor Lester Holt following news of his departure from NBC Nightly News, ...