Sheridan Smith is set to reprise her role as Rudi in the final Gavin and Stacey Christmas special, despite a past falling out with co-star James Corden. Sheridan, who played Smithy's sister in the first two series, has not appeared since 2010 and missed the 2019 special. Sources reveal she seamlessly stepped back into her role, and her scenes have been praised. Fans are eagerly anticipating the final episode, which will also feature returning characters like Neil the baby, now much older, and Uncle Bryn. The special, filming on Barry Island, promises to resolve lingering plotlines, including whether Smithy accepted Nessa's proposal.