A tip sheet for the "Avengers: Age of Ultron" premiere in Los Angeles revealed two new unknown and unseen cast members.

Devin Faraci, a reporter for Badass Digest, tweeted the release that lists all the film's stars who will walk the red carpet at The Dolby Theatre in Hollywood on April 13. Following names like Robert Downey Jr. and Chris Evans, the tip sheet listed actresses Julie Delpy and Linda Cardellini, who have not been mentioned as part of the cast so far.

The release gave no other clues as to what roles the Delpy and Cardellini would play. They have not been seen in any of the trailers for the "Avengers" sequel.

Others walking the red carpet as special guests include most of the "Agents of S.H.I.E.L.D." and "Agent Carter" casts, Paul Rudd from "Ant-Man" and other stars from Marvel movies.

"Avengers: Age of Ultron" will premiere in theaters on May 1 (although most screenings start on the evening of April 30).