The Casper star is believed to have tied he knot with film industry beau James at a private ceremony in New York on Saturday (26 October).
Christina has yet to comment on the marriage news, but People magazine quotes sources who say the star looked gorgeous in a white silk Givenchy haute couture gown.
The 33-year-old met her camera technician husband on the set of her former TV series Pan Am, which aired in 2011.
Christina confimed their engagement in February 2012.
The former child star, who shot to fame in childhood favourites like The Addams Family and Now And Then, has kept her private life largely away from the spotlight but she did tell People earlier this year she can't wait to start calling James her husband.
"I can't wait for 'husband' because then I can really throw my weight around. 'My husband's going to come down here and talk to you!' That's a huge threat," she joked.
Congrats to Christina and James!