Photos: Pregnant celebrities
Celebrities show off their baby bumps on and off the red carpet.
Vanessa Lachey poses at a P&G Future Friendly event in Los Angeles. (April 10, 2012)
A pregnant Kristin Cavallari poses at the Conde Nast Traveler Hot List Party at The Presidential Suite of Hotel Bel-Air in Los Angeles. (April 12, 2012)
Actress Tori Spelling poses for a portrait in New York. (Apr. 3, 2012)
Alyson Hannigan, a cast member in "American Reunion," poses with her husband, actor Alexis Denisof, at the premiere of the film in Los Angeles. (March 19, 2012)
Actress and singer Jessica Simpson displays her baby bump as she is dressed as a mummy in Los Angeles.Simpson released the photo on her Twitter page. (Oct. 31, 2011)
Actress Amy Poehler attends a special screening of 'The Kids Are All Right' at the Landmark Sunshine Cinemas in Manhattan. (June 30, 2010)
Kourtney Kardashian attends the Windows Phone Free-Time Machine event in Manhattan on April 9, 2012.
Bette Midler is shown in Nov. 1986.
Melissa Joan Hart arrives for the Grammy Awards in Los Angeles. (Feb. 10, 2008)
Isla Fisher arrives at the premiere of "Hot Rod" in Los Angeles. (July 26, 2007)
Jaime Pressly, nominated for outstanding performance by a female actor in a comedy series for her work in "My Name is Earl," arrives at the 13th Annual Screen Actors Guild Awards in Los Angeles. (Jan. 28, 2007)
Pregnant actress Sienna Miller attends the unveiling of "The Ever Changing Face of Beauty" video installation created by fashion photographer Solve Sundsbo at the Park Avenue Armory in Manhattan. (Feb. 14, 2012)
British actress Elizabeth Taylor, left, chats with Princess Diana, Princess of Wales, after a charity premiere of "The Little Foxes", in which Taylor stars. Princess Diana is expecting her first baby in June. Victoria Palace Theatre, London. (March 8, 1982)
Natalie Portman poses backstage with the Oscar for best performance by an actress in a leading role for "Black Swan" at the 83rd annual Academy Awards in the Hollywood section of Los Angeles. (Feb. 27, 2011)
Nia Long is a mom again. The actress, 41, welcomed son Kez Sunday on Nov. 7, 2011. (June 26, 2011)
Beyoncé announces her pregnancy at the 2011 MTV Music Awards at the Nokia Theatre in Los Angeles on Aug. 28, 2011.
Christina Aguilera arrives at Rock The Vote's nationwide launch for the 2008 elections hosted by Christina Aguilera in the Kitson Courtyard in West Hollywood, Calif. (Nov. 13, 2007)