American actress who plays Una Chin-Riley, Number One, in Star Trek: Discovery and Star Trek: Strange New Worlds.
Rebecca Romijn is an American actress and former model best known for playing Mystique in the X-Men films, with television roles in Ugly Betty and The Librarians.
She first appeared as Una Chin-Riley, known as Number One, in the second season of Star Trek: Discovery, as Christopher Pike's first officer on the USS Enterprise, and continued the role as a main cast member of Star Trek: Strange New Worlds. Una's secret Illyrian heritage, concealed because genetic modification was outlawed in the Federation, led to her arrest and trial in Ad Astra per Aspera.