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 ...

In a "20/20" special report, David Muir weaves together two decades-long probes. In 1988, 19-year-old Cathy Swartz was a young mother living with her fiancé Mike Warner and her 9-month-old baby ...

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, mere hours after ...

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

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).

You’ve heard the controversy about how David Muir used clothespins to tighten his coat so he looked more fit during LA fire coverage. OK?

David Muir has already had quite a big year, and we still have nearly three months left before it ends! Between marking ...

Veteran anchor David Muir has shared a heartfelt tribute to his long-standing colleague Lester Holt, who's recently made waves with his surprise departure from NBC Nightly News. Lester is clocking ...

David Muir is an award-winning American television journalist and news anchor. He presents World News Tonight and 20/20 on ABC and is also famed for his inspiring America Strong segment.