Andrew Scott has said he was "sworn to secrecy" over his role in the new series of Black Mirror, but admits he could not resist telling his mother.
The 42-year-old actor, who stars in Smithereens, an episode in the fifth series of the Netflix sci-fi anthology, said the show's producers made sure the production was "shrouded in mystery" until its release earlier this week.
Speaking on this weekend's Graham Norton Show, Scott says: "I am relieved it is out. The whole thing was shrouded in mystery.
"No-one tells you what's going on and then you're sworn to secrecy. You can't tell anyone, but I told my mum."
Scott, who does not drive, says the Black Mirror team went above and beyond filming the car scenes and reveals it was "so humiliating" as he can't drive.
"It's so humiliating that I don't drive, and I am playing a driver. They basically had to put the car on a skateboard and I had to act driving. It was so not cool."
When asked about playing 'the hot priest' in Phoebe Waller-Bridge's hit BBC Three series Fleabag, Scott says his new reputation as a sex symbol has "definitely changed things a little bit".
"Weirdly, it's actually the husbands and boyfriends that come up to me.
"I had a strange encounter the other day. I was in the park going over my lines and this little man was just standing staring at me.
"Eventually he said, 'My wife really fancies you, can I have a selfie?'
"He had a mop in one hand and when we had taken the photo he just carried on staring while making the mop jiggle around.
"I wondered if the mop was his 'wife'? It was really weird."
You can catch The Graham Norton Show on BBC One at 10:35pm on Friday, and on Virgin Media One on Saturday at 9:35pm.
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