The rumor is sparked by an Instagram photo featuring the "Bruce Almighty" actor paying a visit to the movie sets, reported Aceshowbiz.
"It's Jim Carrey! He came to the spiderman set today! I wonder what he's doing there," a fan captioned the said picture.
Carrey might only have dropped by for a while, but reports suggest it could be a hint at his potential involvement in the second installment in the "Amazing Spider-Man" film series.