An Avengers and X-Men crossover movie could happen after Disney-Fox merger. Facebook/Avengers

A dead character from “Doctor Strange” movie will reportedly be back in “Avengers 4.” Meanwhile, another actress has been cast in an undisclosed role in the movie.

According to a report by TheWrap, “13 Reasons Why” star Katherine Langford has been cast in “Avengers 4.” The actress has reportedly completed her part of the filming, but details about her character are currently being kept under wraps.

Katherine has been nominated for the Golden Globe for her performance in “13 Reasons Why.” Some of her other projects include “Robot Chicken” and “Love, Simon.”

Filming of “Avengers 4” has already wrapped, but very few details about the movie have been revealed. Even the title of the film is a secret. However, some details have surfaced online in the past few days, and a new report reveals that a dead character from “Doctor Strange” movie is coming back. The following portion of the article contains spoilers.

During the panel discussion at the Austin Film Festival, Executive Producer Michael Grillo let it slip that “Doctor Strange” actress Tilda Swinton (Ancient One) filmed a few scenes for the upcoming movie. Swinton’s name hasn’t been officially announced yet. It will be interesting to see how this dead character will return.

Swinton may be there for just a cameo appearance. Grillo revealed that by the time they got to filming scenes related to the actress, Swinton was available for just one day, which suggests that she will have a very limited screen time in the movie.

As reported previously, Frank Grillo (Crossbones) confirmed in a recent interview that his character will be back for a flashback sequence. Crossbones is a character from “Captain America: Civil War,” who died in that film. It remains to be seen if more dead characters from other Marvel movies will return in similar flash back sequences.