The Sherlock star can be seen discussing the popular sci-fi franchise on tonight's Graham Norton Show, during which he admitted dropping by the film set.
Cumberbatch has worked with director JJ Abrams before, on Star Trek Into Darkness, which might explain his visit.
"I went to the set. It was incredible," he said, before seemingly regretting his revelation and answering subsequent questions with "no comment".
"I probably shouldn't be saying these things," he said.
The 38-year-old actor shot down Star Wars rumours earlier this year when he told fans at Oz Comic Con that he "would've liked a part but it won’t happen sadly".
Cumberbatch is busy promoting his latest film, The Imitation Game, in which he plays persecuted World War II codebreaker Alan Turing alongside Keira Knightley.
Miranda Hart, Timothy Spall and Maroon 5 join him on Graham Norton's couch this week.
Original Star Wars actor Warwick Davis revealed last week that he is on board for the sequel, while his co-stars Harrison Ford, Mark Hamill, Carrie Fisher, Kenny Baker and Peter Mayhew are also returning.
John Boyega, Daisy Ridley, Adam Driver, Domhnall Gleeson and Lupita Nyong'o are among the franchise's new faces.
Watch Apple TV+ free for 7 days
New subscribers only. £8.99/mo. after free trial. Plan auto-renews until cancelled
Join our commenting forum
Join thought-provoking conversations, follow other Independent readers and see their replies