Matt Damon has revealed that he has signed autographs as Mark Wahlberg when he has been mistaken for his fellow screen star.
The Elysium actor admitted that the duo, who were in The Departed together, have made a pact to play along with the pretence when people tend to confuse them for one another.
"All the time. I get Mark Wahlberg a lot," he told Absolute Radio.
"I've talked to Mark about (it) because he gets me. People will come up and say, 'I love you in the Bourne Identity', so Mark and I have a deal. If we're mistaken for one another, we have to be as polite as possible."
Matt said he has also posed for photographs as Mark, adding: "You have to be as nice possible and if they keep the thing going, you have to keep it going."
The Oscar-winning actor also revealed he used to buy expensive power tools for his painter-artist brother Kyle when he first started out.
"You know back in the day, when I would get a job I would buy my brother a power tool, every job. Seriously for like the first 15 movies I got, I did that. He's got everything," he said.