"Succession" star Alan Ruck is opening up about his real-life undercover role as a driver in President BidenJoe BidenDeputy AG: DOJ investigating fake Trump electors On The Money — Vaccine-or-test mandate for businesses nixed Warner tests positive for breakthrough COVID-19 case MORE's motorcade.

The actor — whose character Connor Roy is attempting a White House bid in the third season of the HBO dramedy — offered a few new details about how he popped up as a volunteer driver in Biden's motorcade during a California stop in September.

A friend who works as part of Biden's advance team, Ruck said during a Monday appearance on "Jimmy KimmelJames (Jimmy) Christian KimmelThe Hill's 12:30 Report - Presented by Facebook - Biden's public moment of frustration CNN's Tapper defends Doocy after outburst from Biden Biden to appear on 'The Tonight Show Starring Jimmy Fallon' on Friday MORE Live!," unexpectedly offered him the behind-the-wheel opportunity.

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"She said, 'What are you doing Monday?'" Ruck, 65, recalled.

"I said, 'Nothing.' She said, 'You want to drive in a presidential motorcade?' And I said, 'Yeah.'"

"Apparently they fly Secret Service and military people to drive the really important people, but then when it comes to members of the press, they rely on people like me," he added with a chuckle.

The journalists packed in the press van, Ruck said, at first didn't recognize the performer steering the vehicle.

"They didn't know it was me for awhile, and then this one guy said, 'Do you know who you sound like?'"

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After Ruck was named as the mystery driver's doppelgänger, he said he replied, "Is he any good?"

"I always ask 'Is he any good? And if they say 'Yeah, he's good,' then I go on."

Ruck also weighed in on his "Succession" character's political aspirations, saying, "Connor's a little damaged. He's got some delusional disorder."

"And yet, stranger things have happened," Kimmel responded, an apparent reference to former President TrumpDonald TrumpDeputy AG: DOJ investigating fake Trump electors Former Boston Red Sox star David Ortiz elected to Baseball Hall of Fame Overnight Health Care — Senators unveil pandemic prep overhaul MORE's 2016 White House win.