Sophie Okonedo's 'Big 2026' continues with 'Mouse,' the latest from the 'Ghostlight' filmmakers

IFC Films released the official trailer for "Mouse" on 1 September 2026, the latest feature from the writing-directing partnership of Kelly O'Sullivan and Alex Thompson, with Sophie Okonedo in the lead (First Showing, 1 September 2026, 15:37 UTC; IndieWire, 1 September 2026, 14:22 UTC). The trailer plays the moment the duo have made their name on: a single, dry line, weighted to do the dramatic work. Okonedo's character tells someone close to her, "Sometimes I used to wish that Callie was a bit more like you" (First Showing, 1 September 2026, 15:37 UTC).

For Okonedo, the trailer caps a stretch IndieWire is reading as a "Big 2026," a year in which she has moved between higher-profile work and an IFC acquisition like "Mouse" without the seam showing (IndieWire, 1 September 2026, 14:22 UTC). For O'Sullivan and Thompson, the trailer lands as a continuation of the festival-to-platform pipeline that has carried their two previous films, "Saint Frances" and the indie surprise "Ghostlight," from the festival circuit to wider audiences (IndieWire, 1 September 2026, 14:22 UTC).

The line that does the work

The trailer's pivot is a single sentence at what looks like a kitchen table. Okonedo's character speaks it at someone off-screen, a woman whose presence in the frame implies a relationship the trailer does not spell out, then pivots on a beat that sounds like affection and lands like recognition. The exchange turns on the name "Callie," dropped without context, the way a name belongs to people who have been arguing about it for years (First Showing, 1 September 2026, 15:37 UTC).

The IndieWire trailer coverage flags the film as an acclaimed grief drama, a tonal register that reads in the trailer as restrained rather than mournful (IndieWire, 1 September 2026, 14:22 UTC). First Showing's trailer write-up pairs that register with Okonedo's lead, which is to say the trailer is selling a small, performance-driven film rather than a premise-driven one.

The filmmakers behind the trailer

O'Sullivan and Thompson have built a track record on the festival circuit. IndieWire frames "Mouse" as the latest from the same team that made "Saint Frances" and "Ghostlight," two earlier features, with the trailer positioned as a continuation of that body of work rather than a step away from it (IndieWire, 1 September 2026, 14:22 UTC). The available materials do not specify which of the duo's previous titles were festival launches and which were platform releases, nor how many features the partnership has produced to date.

What the materials do establish is the partnership's mode: a writing-directing duo working in a register First Showing describes as "acclaimed" and IndieWire describes as the through-line connecting their films. "Mouse" reads as the next entry in that line, marketed around the filmmakers' reputation rather than around a breakout premise (First Showing, 1 September 2026, 15:37 UTC; IndieWire, 1 September 2026, 14:22 UTC).

A bigger year than the credits suggest

Okonedo's 2026 is the obvious counterweight to the indie-scale premise of "Mouse." IndieWire's headline reads "Sophie Okonedo's Big 2026 Continues," placing the film inside a wider year for the actor without specifying which other projects share the calendar (IndieWire, 1 September 2026, 14:22 UTC). The available materials do not detail those other projects.

For O'Sullivan and Thompson, the dynamic runs the other way. A higher-profile lead, an IFC Films release, and a trailer timed to the late-summer indie window all suggest a bet on reaching further than the partnership's earlier films, while keeping the tonal register those films established. The trailer's craft, the single line, the kitchen-table setup, points in the same direction: a film built to be discovered rather than launched.

What to watch next

The release schedule for "Mouse" has not been specified in the available materials. The first material signpost will be the film's festival run, which a late-summer trailer conventionally precedes. A platform or theatrical window before the end of the year would slot the film into the late-2026 indie window that the IndieWire write-up implicitly points toward, though the available materials do not specify dates, festivals, or distribution partners beyond IFC (IndieWire, 1 September 2026, 14:22 UTC).

A secondary question is how far Okonedo's profile carries "Mouse" relative to the partnership's earlier work. IndieWire's headline frames the film inside Okonedo's year rather than the filmmakers' filmography, which is itself a signal about which audience the distributor is reaching for. Whether that reach translates into distribution beyond the partnership's prior footprint is the question the festival run will begin to answer.

Desk note: this publication framed the trailer release around the filmmakers' track record and Okonedo's wider year, rather than around the film's premise, because the available materials describe "Mouse" as an acclaimed grief drama without specifying its plot. The trailer line is reported verbatim; the framing around the relationship implied in the trailer is the publication's reading of the trailer and is flagged as such.

Wire provenance

This editorial synthesis draws on the following public wire/social posts:

• https://t.me/FirstShowing/9468
• https://onfs.net/4qU8gCY
• https://t.me/indiewire/32673
• https://www.indiewire.com/news/trailers/mouse-trailer-sophie-okonedo-ghostlight-1235213372/