While Emma Kenney was an actual child when she signed on to play Debbie Gallagher on "Shameless," her TV big sister, Emmy Rossum (who portrayed Fiona Gallagher on the show) was also finding her way as ...

"It's so cool! And I love it. It's like, it's insane how uncanny our resemblance is," she told ET. "Not only do we look the same but I remember -- I noticed it at the first table read and every table ...