Check out a sneak peek of the upcoming series “Hal & Harper,” coming to MUBI. “Hal & Harper” will debut ​its first two episodes on MUBI’s streaming platform on October 19, 2025 with new episodes releasing weekly ​on Sundays through November 30​, 2025.​

“Hal & Harper” is an 8-episode series about two siblings whose closeness is both their comfort and their curse. Hal (series creator Cooper Raiff) and Harper (Lili Reinhart) have built their adult lives side by side in Los Angeles, tethered by a lifetime of inside jokes and shared pain.

When their father (Mark Ruffalo) announces he’s having a baby with his girlfriend, Kate (Betty Gilpin), it forces the siblings to reexamine their past and reckon with the versions of themselves they’ve carried into adulthood. As the lines blur between closeness and codependence, memory and reality, “Hal & Harper” explores how a bond formed in childhood can shape every relationship that comes after—for better or worse.

From series creator, Cooper Raiff, “Hal & Harper,” captures Raiff’s signature blend of humor, melancholy, and emotional clarity, offering a tender and incisive look at family, identity, and the long shadow of a complicated upbringing.

The series stars Lili Reinhart, Cooper Raiff, Betty Gilpin, Mark Ruffalo, Havana Rose Liu, Christopher Meyer, Alyah Chanelle Scott, and Addison Timlin.