Fruit vendor

A fruit vendor is a minor unnamed character first appearing in Season 3. He's played by Alexander Mileman and only appeared in "Mhysa".

Season 3
When Jaime Lannister and Brienne of Tarth return to King's Landing from Harrenhal, they encounter the fruit vendor. He calls Jaime a "country boy" and tells him to get out of his way. This highlights Jaime's changed appearance since leaving King's Landing as he now looks like a low-born country man despite being the son of the richest man in Westeros.