The US Embassy in Canberra has apologised after the Department of State accidentally emailed out a photo of a cat in a cookie monster costume.
The email was actually a fake meeting request entitled "meeting" and featured the photo, entitled 'cat pyjama-jam', AAP reports.
It is unclear how many people received the email.
US mission to Australia public affairs counsellor Gavin Sundwall sent a follow up email two days later apologising for what he called a "training error".
"Sorry to disappoint those of you who were hoping to attend this 'cat pyjama-jam' party, but such an event falls well outside our area of expertise," he said.
"It was a training error made by one of our new staff testing out our email newsletter platform."
The cat in question appears is a 12-year-old tabby named Joey that frequently features on the Instagram account my-furry-babies run by Melbourne woman Jennifer Stewart.
Ms Stewart wrote on Instagram that her cat was not happy the party wouldn't be going forward.
"Joeys (sic) upset that the cat pajama-jam won't be happening," she captioned an image of Joey holding an iPad displaying a news article on the incident.
Newshub.
