Adele is the latest in a string of international stars to pop by Ramsay Street during her visit Down Under.
Taking to Instagram, the 28-year-old British singer has shared a photo of herself posing in Melbourne's Pin Oak Court in the suburb of Vermont South, where Australian soap Neighbours' external shots are filmed.
Sharing the first part of the television show's iconic theme song, she wrote in the picture caption: "Neighhhhbours, should be there for one anotherrrr. That's when good neighhhbours become goood friennnds (sic)".
Speaking to Nova 96.9 FM's Fitzy and Wippa show on Tuesday morning, one of the show's longest-standing cast members, Alan Fletcher, revealed Adele kept her visit well under wraps.
"No one saw her. It was very much under the radar and I noticed she’s been exceptionally good at avoiding paparazzi moments. They obviously planned that out very, very well," he said.
The 59-year-old, who plays Dr Karl Kennedy on Neighbours, also commented on the possibility of Adele joining the cast.
"I can't confirm yet because she hasn’t done her audition," he laughed.
"She’s struggling a bit with the accent," he continued, adding that her tendency "to let the occasional expletive slide out which is not too good for TV" could be an issue, "but I’m sure we can fix that up".
Adele's Neighbours set visit comes just as the show's future in the UK has been reported to be in jeopardy.
The soap, which first aired in the UK 31 years ago, is known for being even more popular with British audiences than Australian.
It was moved from a prime time slot to Channel 5 in 2008, and now there are reports questioning the show's future on British screens.
"The renegotiation of the Neighbours deal has become very fraught and is in jeopardy," a source told The Mirror's Sunday People.
"The failure to reach a deal is being blamed on Channel 5’s new American owners Viacom for refusing to sign off on the figures and not understanding the cultural importance of the show in the UK," the source said. "Neighbours has become a British TV favourite and it would be a sad day if it were to go."
All but confirming the news, TV star Alan simply told Fitzy and Wippa on Tuesday that he was optimistic about the show's future.
"All I can say is that the relationship with our broadcasters Channel 5 and Channel Eleven couldn’t be better and couldn’t be stronger.
"And with the stories that we are doing at the moment, particularly right now with the stories on air, Toadie’s over in London chasing Dee Bliss, that storyline has probably been one of the most successful we’ve ever had in terms of audience numbers so it’s absolutely going off at the moment."