LOS ANGELES (AFP) - Actress Jessica Alba has wed long-time boyfriend and "Fantastic Four" co-star Cash Warren in a private ceremony, People magazine reported on Tuesday. The 27-year-old screen siren, who is pregnant with Warren's child, tied the knot on Monday, her representative Brad Cafarelli confirmed to People. Cafarelli could not be immediately contacted for comment. Alba, who met Warren on the set of the "Fantastic Four" in 2004, confirmed her pregnancy in December last year. Alba shot to fame in the hit television series "Dark Angel." In addition to the two "Fantastic Four" movies, her recent films include "Sin City", "The Eye" and "Good Luck Chuck."