"He saved lives ... a real life hero," Boseman said of James Shaw Jr.
"I told my husband I wanted a picture alone with Jason Momoa, but he wasn't comfortable with that," the woman in the photo captioned the picture.
The Jurassic World: Fallen Kingdom star, 38, was spotted on a Father's Day with Katherine Schwarzenegger.
Sandra Bullock Was 'Afraid' of Harvey Weinstein and 'Really, Really Scared' When Women Spoke Out
"I wasn't asked to be in that world. I learnt early on to shut things off so those things didn't come my way," she added.
The actress and activist, 43, made her 61st mission as a UNHCR Special Envoy for the UN Refugee Agency on Saturday, visiting West Mosul, Iraq.
Brad Pitt Relieved to Be Able to See His Children More: 'He’s Been Missing His Kids Like Crazy'
"To live so close to them, but not seeing them often, has definitely been painful for him," the source adds.