Saldana and the Italian artist, both 34, were first linked in mid-May after they were spotted kissing after her 'Star Trek Into Darkness' premiere in LA.
The hush-hush ceremony took place in London with very close friends attending, reported Us magazine.
"It was super small but very romantic and beautiful," the magazine said quoting a source.
Saldana and the artist have reportedly known each other for a long time.
"Zoe's thrilled to have someone she can enjoy life with!" another source said.
