Halle Berry

When it comes to style, Halle Berry's look is best characterized by the curve-hugging gowns that she favors on Hollywood's red carpets. Never one to shy away from a fashion risk, Halle's most daring looks have included dramatic cutouts, plunging necklines, and sky-high slits. When she's "off duty," though, it's a whole other story. The actress can credit her impressive physique to an active, laid-back lifestyle that includes plenty of casual activewear.

When she announced that she is expecting her second child last month (daughter Nahla is now 5), there was no doubt that the 46-year-old mom-to-be would cruise through this pregnancy with as much panache as she did her first. Here, see some of the highlights of the beautiful mom-to-be's best looks so far — from gym gear to glam gowns!

Celebrity moms were treated to special appreciation from their little ones leading up to Sunday's Mother's Day celebrations. Halle Berry wrapped up a busy weekend with Mother's Day brunch alongside her daughter, Nahla Aubry, and fiancé, Olivier Martinez, while Hilary Duff escaped to Cancun, Mexico, with her family for the holiday. Jessica Alba and her brood went to Mother's Day brunch on Sunday, and stylish toddler Vida McConaughey took his mom, Camila Alves, jewelry shopping in NYC on Sunday. See all the sweet celebrity family outings before and on Mother's Day!

Halle Berry teamed up with Modern Family star Julie Bowen to kick off the 20th annual EIF Revlon Run/Walk For Women in LA today. The event raises money for research, treatment, and support of medically underserved women with cancer. She has been a supporter of the beauty brand and its various charities since 1996, when she first signed on as a beauty ambassador. Halle dropped by the charity walk while on a break from filming her upcoming movie, X-Men: Days of Future Past, alongside Hugh Jackman and Jennifer Lawrence. Aside from working, Halle has been keeping active during her second pregnancy and was even spotted wearing gym clothes yesterday leading up to the Revlon event. She isn't the only star who is supporting Revlon's race — Emma Stone and Olivia Wilde hosted the Revlon Run/Walk in NYC last weekend.

Pregnancy at 46 certainly isn't slowing down Halle Berry! Halle put her growing baby bump on display in a tight workout outfit today while running errands in LA. Following her morning workout, Halle was later joined by her daughter, Nahla Aubry. The actress is expecting her second child, her first with fiancé Olivier Martinez, and announced her pregnancy last month while promoting her thriller The Call.

Halle is also working through her pregnancy, since she is currently reprising her role as Storm for X-Men: Days of Future Past. The upcoming movie centers around time travel and alternate dimensions, which is fitting since director Bryan Singer is bringing together the casts from the two originals, X-Men: The Last Stand, and X-Men: First Class. In turn, Halle will share the big screen with former costars Hugh Jackman, Ian McKellen, and Patrick Stewart as well as Michael Fassbender and Jennifer Lawrence. The third installation is due out in Summer 2014, well after Halle's due date.

Baseball season is in full swing, and Ginnifer Goodwin and Julianne Hough teamed up to open last night's Dodgers game with the first pitch in LA. Many other stars have had the honor of taking the mound to throw the first pitch for their favorite baseball teams as well. Victoria Beckham donned an LA Dodgers jacket to throw the ceremonial ball, while Matthew McConaughey suited up in Mets gear to show his skills in NYC. Tom Cruise packed some heat on his pitch at a professional baseball game in Japan, and Gisele Bündchen showed off her muscles on the mound in Boston.

Plenty of other celebrities have had the honor of the inaugural throw — click through the gallery to see the rest of the stars who have thrown the first pitch!

It was an action-packed week for stars between vacationing on tropical beaches and hitting the red carpet for promotional duties. Jessica Alba and Nicole Richie both donned bikinis for a getaway to St. Barts, while Robert Pattinson and Kristen Stewart shared a sweet sushi date following her 23rd birthday celebrations in LA. Angelina Jolie traveled to London to speak at the G8 Summit, and Bradley Cooper and his new girlfriend, Suki Waterhouse, packed on the PDA during a romantic trip to Paris.

Plenty more went down with celebrities this week, so be sure to click through the rest of the fun shots!

Halle Berry smiled big for the cameras at the Rio de Janeiro premiere of The Call on last night. She flaunted her baby bump in a sexy lace cutout gown for the cameras and stopped to chat with a pal on her way inside the screening. Halle has bared her pregnant belly on the red carpet multiple times since announcing the news last week. She attended a United Nations World Food Program event over the weekend and then headed overseas to start promotions for her latest film. Halle already stopped in Buenos Aires and attended a photocall in Brazil yesterday.

Halle Berry made a chic appearance in Rio de Janeiro today as part of her South American press tour for her newest film, The Call. The expecting star wore a black tank top and skinny jeans as she attended a photocall at Copacabana Palace. Earlier in the week, Halle made a stop in Buenos Aires to attend the Argentinean premiere of her movie. She hugged her baby bump in front of photographers after confirming that she is expecting her second child last week. Halle commented that the pregnancy was a "big surprise" at her age, but she is happy that her daughter, Nahla, will get a playmate.