Prankster and certified hottie Chris Pratt has revealed that some clothes-free hijinks on the set of his old NBC comedy Parks & Recreation landed him in hot water – and with a very stern letter from the network’s HR department.

“We were shooting a scene where my character turns up naked at my co-star’s door. I was wearing skin coloured underwear and I wasn’t getting quite the right reaction I was hoping for,” Pratt says in the latest episode of The Graham Norton Show.

“It was late in the day so I decided to improvise and drop my trousers for the take. Her reaction was great and it’s the take they used!”

“Then I got a letter from NBC’s HR department that said, ‘There is a protocol about nude scenes. This is not a joke and you are being reprimanded and you can’t go around telling people about this like some kind of joke!’ I’ve framed the letter!”

That hasn’t stopped him, though – Pratt’s dropped the anecdote into several interviews as his star has risen, but that’s the first time he’s mentioned the wrist-slap he received for flashing co-star Amy Poehler his unmentionables. Here’s a picture of the scene in question – back when Chris had his adorable dadbod:

So cuddly. You can flash us any day, Pratt.