🎬Hal & Harper (2025) – Cooper Raiff’s Offbeat & Heartfelt Sibling Saga Lands on MUBI This October: Cast, Plot, Release Date & Where to Watch

Get ready for a tender, funny, and deeply human new series — Hal & Harper — streaming exclusively on MUBI from October 19, 2025. Created, written, and directed by Cooper Raiff, this Sundance favorite stars Raiff, Lili Reinhart, and Mark Ruffalo in a genre-blending story about family, love, and codependency.

🍃 A Family That’s Too Close for Comfort

From the mind behind Cha Cha Real Smooth and Shithouse, Cooper Raiff returns with Hal & Harper, a series that turns childhood nostalgia into emotional chaos. The show follows siblings Hal (Raiff) and Harper (Lili Reinhart) — best friends since birth, but maybe a little too close for their own good.

Their carefully balanced world starts to unravel when their father (played by the always magnetic Mark Ruffalo) announces he’s having a baby with his new girlfriend (Betty Gilpin). Suddenly, Hal and Harper must confront their shared past and the messy, co-dependent bond that’s been both their comfort and their curse.

It’s part comedy, part tragedy, and fully Cooper Raiff — heartfelt, awkward, and achingly real. As Harper says in one moment of painful honesty, “You’re not supposed to need your sibling this much.”

🌈 A Sundance Standout Finds Its Home

Hal & Harper had its world premiere at the 2025 Sundance Film Festival, earning praise for its emotional intelligence, surreal humor, and the chemistry between Raiff and Reinhart. Now, it’s finally making its streaming debut on MUBI, beginning October 19 in the US, France, and Latin America.

The series runs for eight episodes, each blending introspection and absurdity in equal measure — think Eighth Grade meets Fleabag, with a touch of indie dream logic.

👨‍👩‍👧 Cast That Feels Like Family

The ensemble is a powerhouse of emotional range and comedic charm:

• Cooper Raiff as Hal — the introspective, slightly lost brother trying to grow up without losing his identity.

• Lili Reinhart as Harper — grounded, caring, and quietly unraveling under the weight of her bond with Hal.

• Mark Ruffalo as Dad — the well-meaning but flawed parent forcing his kids to finally face adulthood.

• Betty Gilpin as Kate — the father’s girlfriend, whose pregnancy becomes the catalyst for chaos.

• Addison Timlin as Audrey, Harper’s co-worker.

• Havana Rose Liu as Abby, Hal’s on-and-off girlfriend.

• Alyah Chanelle Scott as Jesse, Harper’s longtime girlfriend.

The concept’s most striking twist? Though the show is about 7- and 9-year-old siblings, Raiff casts adult actors in the roles — a surreal creative choice that amplifies their emotional immaturity and vulnerability.

🎥 Cooper Raiff’s Creative Vision

Written, directed, and co-produced by Cooper Raiff, Hal & Harper is another testament to his fascination with growing pains — both emotional and existential. It’s not about childhood, but rather how we carry childhood into everything we do.

Behind the camera, Raiff is joined by executive producers Lili Reinhart, Daniel Lewis, Addison Timlin, and Clementine Quittner. Together, they create a world that’s equal parts intimate and imaginative — one that mirrors how memory and reality blur when family is involved.

🍰 Genre and Tone: Bittersweet, Awkward, and Beautiful

At its core, Hal & Harper is a comedy-drama, but it doesn’t play by the rules. One minute it’s laugh-out-loud funny, the next it’s raw and devastating. The humor is quirky yet grounded — think scenes where adult Hal throws a tantrum like a kid, or Harper monologues about love while wearing a paper crown.

The show asks: How do we grow up without growing apart?

🕊️ Why You Should Watch

If you loved Raiff’s previous works or are drawn to emotionally rich, indie-style storytelling, Hal & Harper is a must-watch. It’s a show that captures the messy, beautiful weirdness of being family — told through a lens that’s tender, absurd, and unflinchingly honest.

As Dad (Mark Ruffalo) says in one of the show’s most touching lines:

“You’re both still kids pretending to be grown-ups. Maybe that’s all any of us ever do.”

⭐ Final Thoughts

With an all-star cast, Sundance pedigree, and Cooper Raiff’s signature heart-on-sleeve storytelling, Hal & Harper is shaping up to be one of 2025’s most talked-about TV debuts. It’s not just a show about siblings — it’s about how love, dependency, and growing up collide in the strangest, most human ways.

📺 Stream Hal & Harper exclusively on MUBI from October 19, 2025 — available in the US, France, and Latin America.