charlize-theron-600Charlize Theron and Sean Penn sure have been spending a lot of time together lately.

The two Oscar winners who have know each other a long time, maybe since both winning lead actor category in 2003, seem to have taken their friendship to a new level. Dating.

After spending New Year’s together in Hawaii, pictured at each others homes, and most recently doing a local Starbucks coffee run,  the twosome headed to ArcLight Cinemas in Hollywood on Sunday,  for a screening of The Wolf of Wall Street.

An eyewitness tells E! News exclusively the A-list duo: she 38, he 53, “looked like a normal couple” and “seemed really casual and comfortable” leaving the movie.

After taking in the movie, the pair was spotted “chit-chatting” and “smiling at each other” as they got into their car. From there, they headed to Charlize’s Hollywood Hills, Calif., home where they reportedly spent the night together.

“They are spending night after night together and moving very fast,” a source tells E! News exclusively. “It seems like it’s getting serious and that they can’t get enough of each other.”

Stay tuned.