LILY COLLINS says it was “painful” that her musician father Phil was absent from much of her childhood.

    In her new book “Unfiltered,” the Golden Globe-nominated actress writes: “Many of my deepest insecurities stem from these issues with my dad.”

    She also penned an open letter to the Genesis drummer, saying she forgives him for “not always being there” and “not being the dad I expected.”

    Collins left Lily’s mother Jill Tavelman when the actress was five.

    In her book of essays, “Unfiltered: No Shame, No Regrets, Just Me,” the 27-year-old star explains her father then moved from England to Switzerland, where he stayed for more than two decades. She says a “terrible disconnect” developed between her and Collins — who has four other children — as she got older.

    The actress — nominated for a Golden Globe this year for “Rules Don’t Apply” — encourages her readers to share an open letter she wrote with their fathers, or to write their own. (SD-Agencies)