Rudolph's character is introduced as Dean's sister, a family tie that connects her to the season's central romance without making her part of it, Deadline reports. The cited reports don't disclose what Summer's storyline involves or how much screen time the role carries.

Rudolph is best known for The Baby-Sitters Club and will lead Disney+'s upcoming Holes reboot, according to Deadline. She recently starred in She Keeps Me Young, which premiered at the Tribeca Film Festival earlier this year, and her next project, the feature Hot Year, is already lined up.

Prime Video and Rudolph unveiled the casting together in an Instagram video, Deadline and Variety both note, a rollout style that matches how the show announced its central couple back in May.

The season's central romance now belongs to Allie Hayes, played by Mika Abdalla, and Dean Di Laurentis, played by Stephen Kalyn. Prime Video confirmed the shift with a video and photo rollout in May, Deadline reported.

Series creator Louisa Levy framed the move as a continuation rather than a reset. "We are so excited to continue Allie and Dean's story as our primary romance of season two after kickstarting their romance in season one," Levy said, according to Variety. She added that Hannah and Garrett, season one's central couple, remain "an integral part of our strong ensemble," per the same statement, rather than being written out of the show.

The season draws from The Score, the third novel in Elle Kennedy's Off Campus book series, which follows Dean and Allie, Deadline reports. That's a notable sequencing choice: in Kennedy's novels, Dean and Allie's romance actually arrives after the story told in Book 2, The Mistake. Collider's coverage frames Prime Video's decision to adapt Book 3 before Book 2 as a deliberate reversal of the source material's order.

Levy has said she wanted audiences to get familiar with characters who will eventually take center stage, according to Collider's reporting. The reporting doesn't confirm a future season built around that couple, only that the show is laying groundwork for it now.

The season's confirmed series regulars are Mika Abdalla as Allie Hayes, Stephen Kalyn as Dean Di Laurentis, Ella Bright as Hannah Wells, Belmont Cameli as Garrett Graham, Antonio Cipriano as John Logan, and Jalen Thomas Brooks as John Tucker, according to Teen Vogue and Deadline. India Fowler joined that list in April as a new series regular playing Grace Ivers, per Teen Vogue.

Fowler's character is the love interest of Cipriano's John Logan, and the two are the central couple from Book 2, The Mistake, Deadline reports. Per Collider's framing, their story "waits in the wings" this season while Dean and Allie's romance takes the lead.

One tier down from the series regulars sits the recurring cast, currently just one name: Phillipa Soo, known for Hamilton, who plays Scarlett, a theatre artist guest-directing a play in the college drama department where Allie is a student, according to Deadline. Rudolph's Summer sits a level below that, billed as a guest role rather than a recurring or regular part, per Deadline and Variety's reporting on yesterday's announcement.

On the departures side, Josh Heuston, who played Justin Kohl in season one, will not return. Levy confirmed the exit to TV Guide, as reported by Teen Vogue.

That gives the roster four distinct tiers: seven series regulars carrying the show, one recurring guest star in Soo, one confirmed guest turn in Rudolph, and one confirmed exit in Heuston. It's a clearer picture than a single cast list suggests, and it shows how deliberately Prime Video is calibrating who gets billing weight this season.

Prime Video hasn't announced a premiere date, based on the reporting reviewed for this piece. Filming is reportedly expected to wrap in October, according to Teen Vogue, roughly the same production window as season one, which filmed from June to October 2025 ahead of a May 2026 launch. That timeline isn't a reliable predictor of when season two will actually air, since no release window has been set.

Prime Video renewed Off Campus for a second season in February, before the first season had even premiered, per Teen Vogue. That's an early vote of confidence worth noting on its own; most streamers wait for ratings before locking in a next chapter.

On the music side, Levy has teased fewer live-performance numbers this time. "There's gonna be fewer live songs, I'll just be honest," she said, according to Teen Vogue's reporting, while confirming the show's needle-drop soundtrack approach continues alongside composer Keegan DeWitt's score. Cast members Ella Bright and Mika Abdalla also teased a pop-star feature during Obsessed Fest, similar to season one's use of J.Lo's "On the Floor," per the same report.

Summer's exact storyline, her episode count, and how she factors into Allie and Dean's relationship remain unconfirmed. The reporting so far establishes only her family tie to Dean and her guest-star billing.

Prime Video has announced the cast and the central romance, but the premiere date and Summer's storyline remain unconfirmed. That leaves two clear milestones to watch: a release-date announcement, and whatever details emerge about how, or whether, the show eventually gives Grace and John Logan's story its own season.