Mystique has Twins

Rebecca Romijin Stamos has Twin Girls

The new Mommy played the mutant shapeshifter Mystique in the X-Men films and made a big splash in her non-costume made of blue pasties.

Romijin (36) and hubby/daddy Jerry O'Connell (34) named their new girls Dolly Rebecca Rose and Charlie Tamara Tulip. The couple were married in 2007.

Born December 28th, the babies are the couple's first children.

Publicist Lewis Kay said in a statement Monday that "mother, father and both girls are all home and doing well."