Un volto, due destini - I Know This Much Is True

Mark Ruffalo lost 20 pounds before filming began to play Dominick. After shooting those scenes for 16 weeks, he took a six-week break to gain 30 pounds to play Thomas. He ate whatever he wanted, including large amounts of fast food, donuts, mashed potatoes and oatmeal.

Gabe Fazio, who plays Shawn Tudesco, is the same height as Ruffalo and also served as his acting double, portraying whichever twin Ruffalo wasn't. During Ruffalo's weight gain, he lost 30 pounds to stand in as Dominick.

Dedication before end credits:  "In loving memory Megan Cianfrance McGinnis (1983 - 2019) & Scott Ruffalo (1968 - 2008)."

Featured in The 72nd Primetime Emmy Awards (2020)