The actress will appear on the March 18 episode of '20/20'
Credit: ABC News

Diane Sawyer has lined up another exclusive, this time with the Mexican-American actress who helped arrange the interview between Sean Penn and Joaquín “El Chapo” Guzmán.

Sawyer will conduct the first sit-down TV interview with Kate del Castillo on March 18, ABC News announced Friday. The actress is expected to discuss the events of the interview and what led to the capture of the drug lord.

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In 2012, Del Castillo posted support for El Chapo via Twitter by writing, “Today I believe more in El Chapo Guzmán than I do in the governments that hide truths from me, even if they are painful, who hide the cures for cancer….Mr. Chapo, wouldn’t it be cool if you started trafficking with the good? Come on … you would be the hero of heroes. Let’s traffic with love, you know how.” Two years later, a man who claimed to be El Chapo’s lawyer sought her help to make a movie about the drug lord’s life.

Del Castillo has already given an interview to The New Yorker, which can be found here.

The Sawyer special edition of 20/20 will air at 10 p.m. ET on March 18.