The costars reunited on Duchovny's 'Fail Better' podcast to talk about the tougher times during their hit show's initial run

Anderson, 56, spoke to Duchovny, 64, on the Nov. 12 episode of his "Fail Better" podcast, with the two revisiting their time together on the hit Fox show that ran from 1993-2002, spawned two movies, and revivals in 2016 and 2018.

We know each other very deeply and yet we don’t know each other either in some weird way,” the actor says David Duchovny said he had a “failure of friendship” with “X-Files” co-star Gillian Anderson when the hit sci-fi series was at its peak in the 1990s.

David Duchovny and Gillian Anderson had incredible chemistry on The X-Files as beloved characters Mulder and Scully, but apparently things weren't always so rosy behind the scenes. The duo opened up about their years-long friendship during the Tuesday,

David Duchovny and Gillian Anderson enjoyed huge success on The X Files - but the co-stars didn't always get on and would regularly go weeks without speaking

There was a long time, working on the show, where we were just not even dealing with one another off-camera,” David Duchovny recalled.