'This brings me so much joy,' Rossum, 37, captioned the two selfies she posted for her 4.2 million Instagram followers.They appeared to be out for a hike as they posed in sweatshirts - grey for her and sage green for him.Old friends: Emmy Rossum reunited with her former Shameless co-star Ethan Cutkowsky, 24, on Wednesday
'This business is always an adventure, full of travel and opportunities to tell stories. Usually as an actor, every few months, you travel to a new place, start a new project, build a new character, learn new rhythms, new inside jokes with your crew, make new friends,' the 31-year-old wrote in part on Facebook.
'There are these real connections, real friendships that bring us back season after season after season.'