"I've realized that many of my deepest insecurities stem from these issues with my dad," she writes.
Lily Collins addresses her tumultuous relationship with her father Phil Collins with an open letter in her new book of essays, Unfiltered: No Shame, No Regrets, Just Me.
"Because my dad was often gone, I never wanted to do anything that would make him stay away even longer," she writes in the chapter titled "A Letter to All Dads." "I became extra careful about what I said and how I said it, afraid he'd think I was angry or didn't love him. And the truth is, I was angry. I missed him and wanted him there."
The 27-year-old actress' parents divorced when she was 5 and Phil Collins then moved from England to Switzerland, creating an estrangement that she writes had a profound effect on her -- ranging from relationship issues to her struggle with eating disorders.