Complex sentence: Cleo Eastman (Rowan Blanchard) is a teen girl who is always living in her older popular sister Molly (Paris Berelc) 's shadows, her sister is the most popular girl at school and recognized by everyone, but she is hardly seen by anyone else.
Split into simpler sentences: Cleo Eastman (Rowan Blanchard) is a teen girl who is always living in the shadow of her popular older sister, Molly (Paris Berelc). Her sister is the most popular girl at school and recognized by everyone, but Cleo is barely noticed by anyone else.