New photos show Theron, 38, at the Los Angeles International Airport wearing minimal make-up and jewelry and what appears to be a diamond engagement band on her left hand.
The pair began dating last year. They are notoriously private so they haven't officially announced they are taking their relationship to the next level. Penn's representative declined to comment on the rumor, and Theron's spokesperson also hasn't responded to the speculation.
Variety reported earlier this week the pair's giant, 3,158 square foot home was listed for $2.9 million and change. Robin's father and TV star Alan Thicke bought the property back in 1990 for just under $1 million.
Many took the listing as the sign the two were going to make their split official, although it could also be preparation for Robin's lower income. The singer's recent album Paula, named after Patton, has flopped ...