Justin Timberlake and Ben Affleck laughed on the set of Runner, Runner in Puerto Rico yesterday. Ben sported arm tattoos and a tank for the role while Justin went with white pants and a tee. Production started late last month, but it hasn't been just about work. Ben and Justin have both welcomed loved ones to the Caribbean island. Justin's fiancée, Jessica Biel, wore a bikini to visit a nearby beach in June and Ben's family flew in over the weekend. Ben greeted Jennifer Garner, Violet, Seraphina, and their son, Samuel, at the airport. It was a sweet reunion for the Garner-Afflecks, who will soon be on the go again when Jennifer starts promoting The Odd Life of Timothy Green in the coming weeks.