Ryan Reynolds is on the move romantically with gorgeous 35-year-old actress Charlize Theron, according to Us.

A source tells the mag that the two "have been dating for months! They're exclusive, and it's very hush-hush." Talk about a sexy twosome!

Witnesses also claim the Green Lantern star's motorcycle was parked outside Theron's home all morning on June 5 ... and the two didn't leave the house until 3pm.

Reynolds, 34, split from wife Scarlett Johansson last December, however the former married couple are still hanging out. Find out where Ryan and ScarJo were seen together ... after the jump.