Jane Edwina Seymour

Actor (Borg Queen, physical performance) — Picard

Actor who physically portrayed the decayed Borg Queen on set in The Last Generation, the 2023 series finale of Star Trek: Picard, with the character's voice supplied by Alice Krige.

Jane Edwina Seymour is an actor who shares one of the more unusual credits in Star Trek: Picard, the body of the Borg Queen in the series finale.
In The Last Generation the Queen is found inside a vast cube hidden in Jupiter's atmosphere, wasted and half-consumed after years of starvation, and directing the assimilated young officers of Starfleet through Jack Crusher. Seymour performed the role on set under extensive prosthetics opposite Patrick Stewart and Ed Speleers.
The voice heard in the finished episode belongs to Alice Krige, who created the character in Star Trek: First Contact and recorded her lines separately, so the final Queen is a combination of the two performers.