Pam St. Clement smoked cannabis during filming for the new ITV travel show 'Gone To Pot'.
The former 'EastEnders' actress - who played Pat Butcher in the soap from 1986 until 2012, with a guest appearance in 2016 - heads on a US road trip in the new programme, and experienced the affects of the drug, which she tried as a joint and through a bong, at an 'alternative' art class.
She revealed: "We were taken to this warehouse . . . there were easels, tables and chairs. We jumped in with both feet and sat down and started to paint this cactus.
"The guy came round with this joint and I took a puff, and [dart player Bobby George] took a puff then we got on with this painting. I thought, 'Oh well this a terrible painting and I don't know what to do with it'. I made it into an alien in the end. It wasn't a cactus at all."
However, it wasn't the only experience Pam - who also stars alongside Linda Robson, Christopher Biggins and John Fashanu on the three-part programme - had with marijuana on the show, which aims to explore the highs and lows of the class B substance.
The celebrities visited a nunnery where the sisters farm weed, and the actress admitted it was "powerful".
She told The Sun newspaper: "This person came along with a glass bowl thing with a pipe and a stem with an open top, like a mini bong, it was very delicate and she gave it to Linda then to me and she said, 'Take a puff'.
"So I took a puff and she said, 'Oh that's enough, that's enough' and I thought, 'Oh my God, this must be powerful'. I passed it on to Bobby and within five to ten minutes me and Bobby were virtually on the floor laughing it was so funny.
"I love it when you get the giggles when you shouldn't. It's wonderful -- just crying we were -- so refreshing to do that, it really is."
'Gone To Pot' starts on ITV at 9pm on Monday (13.11.17).