Ker appeared on the show to promote the third season of the documentary Welcome to Wrexham, the first two episodes of which were released on Disney+ on 2 May.
It documents the 2023-24 campaign, which saw Wrexham finish second in League Two to seal back-to-back promotions.
Interviewed by hosts Simon Rimmer and Tim Lovejoy, Ker told how he got involved with the club, having worked with co-owner Rob McElhenney as a writer on Mythic Quest.
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“I introduced Rob to football during lockdown and encouraged him to watch (the documentary) ‘Sunderland Til I Die’,” Ker said.
“He then texted me: ‘We should buy a football team!’
“In 2019-20, when the season was shortened by COVID, there was an average (attendance) of about 4,500 people per week in the National League.
“It’s a huge number, bigger than a lot of League Two teams get, so we knew there was a huge fan base there.
“The fans saved the club and kept it alive despite a very difficult time.
“Ryan (Reynolds) then got involved because Rob asked him if he wanted to sponsor Wrexham. He said, “I don’t want to be a sponsor, I want to be a co-owner with you.”
“Documentary is huge in America. I was at the Chicago airport a few weeks ago, and two or three people came up to me, and someone tagged me in the most unflattering photo in the world!”
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Earlier in the show, Lovejoy apologized after Ker swore during his introduction, after being asked about the team heading to Las Vegas for a celebration party following their promotion to League One.
Lovejoy asked Ker if they paid for the trip themselves, to which he replied yes, joking that they would have a hard time claiming it through expenses as “p** s-up giant”.
“I apologize if anyone is offended by Humphrey’s mouthiness,” Lovejoy added.