Diane Sawyer to Interview Caitlyn Jenner to Mark 2-Year Anniversary of Sit-Down

Caitlyn Jenner - Getty - H 2016
Getty Images

Caitlyn Jenner - Getty - H 2016

The '20/20' special will air April 21 on ABC.

Diane Sawyer and Caitlyn Jenner will meet again.

The ABC News anchor is set to sit down with Jenner to mark the two-year anniversary of their groundbreaking 2015 interview, in which Jenner opened up about her transition for the first time.

Airing April 21 at 10 p.m., the hourlong 20/20 special coincides with the release of Jenner's memoir, The Secrets of My Life. David Sloan and Mark Robertson will serve as senior exec producer and senior producer, respectively, on the telecast.

There had been talks of the two doing a one-year follow-up interview, but the upcoming 20/20 special will be their first since the breakthrough broadcast.

Airing in April 2015, their first interview special nabbed more than 20 million viewers and marked an important step in Caitlyn's public coming out. Shortly after the telecast, she made her debut as Caitlyn on the cover of Vanity Fair in June. The same day as her cover's debut, which marked the reveal of her new name, Jenner broke the Twitter record for fastest-growing account when she amassed one million followers in just four hours.

Since the landmark interview, Jenner has gone onto star in and exec produce her own E! reality show, I Am Cait, which lasted two seasons, and she continues to make appearances on Keeping Up With the Kardashians. Other recent TV gigs include Transparent and The Celebrity Apprentice.