He's acted out the complete filmography of Tom Hanks with Tom Hanks and reenacted Basic Instinct with Michael Douglas, but now James Corden has revealed what his ultimate "Holy Cow" moment on the Late Late Show has been.
Speaking to E! Online, he recalled the moment when the White House called him up and asked whether having Michelle Obama as a participant on Carpool Karaoke would be of interest.
He recalled: "You're walking around the White House and thinking this is amazing.
"There have been so many moments where we pinch ourselves if I'm being honest."
Speaking about the success of the show, he continued: "I feel very, very humbled by it. I'm very proud of the two years we've had. I think it surpassed anybody's hopes or estimations of what we could have achieved."
Corden admits that at first it was hard to book guests on his show because people in the US didn't really know who he was.
"Now that people know what the show is [it's easier]," he went on. "I think when we launched our first week, we didn't have anyone booked for week two because people were like, 'I don't know who this guy is'.
"Slowly but surely, we've been able to turn that around and I feel like we're now a place where people want to come and they want to come back and that's lovely."
The star recently revealed that he would be bringing his chat show over the UK, telling the Radio Times: "We're talking about it now, really.
"We don't know if we'll be able to get it together but it's certainly something I'd love to do, for sure."