Los Angeles - Ryan Reynolds and Charlize Theron have been dating for months, according to Us Weekly.
A source told the US magazine: "They're exclusive, and it's very hush-hush."
Reports of Ryan's motorbike being parked outside Charlize's home and the actor and actress exiting her house just minutes apart have sparked the romance rumours.
Ryan's divorce from Scarlett Johansson was recently finalised, while Charlize has been single since ending her nine-year relationship with Stuart Townsend in 2010.
Charlize was most recently romantically linked to her long-time friend Keanu Reeves.
A source told the US magazine: "They're exclusive, and it's very hush-hush."
Reports of Ryan's motorbike being parked outside Charlize's home and the actor and actress exiting her house just minutes apart have sparked the romance rumours.
Ryan's divorce from Scarlett Johansson was recently finalised, while Charlize has been single since ending her nine-year relationship with Stuart Townsend in 2010.
Charlize was most recently romantically linked to her long-time friend Keanu Reeves.