Miley Cyrus Liam Hemsworth car shots smoking starbucks Miley Cyrus Liam Hemsworth car shots smoking starbucks

Hmm, who knew Liam Hemsworth was a secret smoker?

On Sunday we spotted the Aussie actor driving fiancee Miley Cyrus around Studio City, and we couldn't believe that he was puffing away inside of her Mercedes SUV! Maybe she smokes inside her pricey ride too so she doesn't mind the smell?

The lovebirds went on a Starbucks run, and we're not sure where they were headed but they had about 8 beverages with them -- maybe this was for the entire Cyrus family?