Julian Castro to Speak With ABC's Diane Sawyer in Advance of Keynote Speech

"ABC WORLD NEWS" anchor Diane Sawyer will talk to San Antonio Mayor Julian Castro tonight, TUESDAY, SEPTEMBER 4. Mayor Castro is set to kick off the Democratic National Convention as its keynote speaker. The interview will air Tuesday night on "World News with Diane Sawyer." Portions of the interview will also be highlighted on ABCNews.com, Yahoo!, ABC News Radio, and ABC's local affiliates.

As part of ABC's special "Your Voice, Your Vote" coverage of the Republican and Democratic National Conventions, Diane Sawyer will be talking to all of the key players in both Florida and North Carolina. Last week in Tampa Sawyer spoke with Mitt and Ann Romney's five sons, Speaker of the House John Boehner, had an exclusive interview with Ann Romney in advance of her convention speech, and spoke with former Governor Jeb Bush.

"ABC World News with Diane Sawyer" airs at 6:30 p.m., ET on the ABC Television Network and on WSOC-TV locally in Charlotte, NC. Michael Corn is the executive producer of the broadcast. Follow Diane Sawyer and the "World News" team online: @DianeSawyer; @ABCWorldNews; facebook.com/DianeSawyer; facebook.com/WorldNews.