Alessandra Corine Ambrósio (born April 11, 1981) is a Brazilian model. Her last name is spelled Ambrósio, but the diacritic mark is omitted in her modeling work. Ambrósio, described by Tyra Banks as "The future of the modeling world", is best known for her work with Victoria's Secret and was chosen as their first spokesmodel for Victoria's Secret PINK line. Ambrósio is currently one of Victoria's Secret Angels and the former face for the UK company Next. Aside from modeling work, Ambrósio represents as the National Ambassador for the National Multiple Sclerosis Society.

Alessandra Ambrosio was born in the small town of Erechim, Brazil on April 11, 1981 to petrol station-owner parents, daughter of Italian and Polish descent.Ambrósio was just eight years old when decided that wanted to be a model, after seeing a picture of top covergirl Karen Mulder in a magazine: "I wanted to be like her", she recalls. She has stated on her official website that she enrolled at a modelling class at the age of 12 and at the age of 14 she was one of 20 finalists for an elite modelling competition in Brazil. However, she felt insecure about her appearance, particularly of her large, obvious ears. So at 11, she had cosmetic surgery done to get her ears pinned back with complications for the two following years. In 2006 on The Tyra Banks Show, Ambrosio said that the surgery had been a bad experience for her and that was discouraged from having plastic surgery again.

She began modeling for Dilson Stein at age 15. Winning Brazil's Elite Model Look, she started her modeling career. Her first big modeling job was the cover of the Brazilian Elle magazine. Elite passed along some of her Polaroids to Guess which led her to do the Millennium GUESS? campaign along with her friend and fellow Brazilian Ana Beatriz Barros. She has since been in huge demand, working with big-name brands including Revlon, Christian Dior, Giorgio Armani, Rolex, Oscar de la Renta, Gucci, Escada, Rocco Barocco, Calvin Klein and Ralph Lauren, as well as the famed Pirelli Calendar.As for fashion shows, she has walked the catwalks for designers such as Laura Biagiotti, Christian Lacroix, Byblos, Fendi, Issey Miyake, Kenzo, Christian Dior, Nicole Miller, Ralph Lauren, Giorgio Armani, Vivienne Westwood, Oscar de la Renta, among others. She appeared in over 50 international magazine covers such as Cosmopolitan, Elle, GQ , Harper's Bazaar, Marie Claire, Ocean Drive, Vogue and the only model to appear on the cover of Glamour in the United States in 2006.

In 2004, Ambrosio launched her line of swimwear called Alessandra Ambrosio by Sais, a division of Rosa Cha. It sold 10,000 units in only its first month on the market.

Her best knowns collaboration is with American lingerie brand Victoria's Secret. She appeared in the Victoria's Secret Fashion Show for the first time in 2000 and started working in the catalog in 2001.She has been a participant in the subsequent shows. In 2004 she was signed as an Angel and she was selected as the first spokesmodel for Victoria's Secret PINK line . Her most notable walk down the runway was in 2005 wearing lingerie made entirely out of candy. Her 'Angel' status has brought her to the public's attention being cited by the popular media as one of the world's sexiest women. She was chosen as one of People magazine's annual 100 Most Beautiful People in the World, in May 2007. Ambrosio was the face for the UK company Next and starred in their first television campaign in 12 years. Only three months after giving birth to her first child, Ambrosio appeared in the Victoria's Secret fashion show 2008.

Ambrosio has made several television appearances, notably a cameo as herself on HBO's Entourage along with Izabel Goulart; The Late Late Show with Craig Kilborn; Late Night with Conan O’Brien; as guest judge on Project Runway season 2: Team Lingerie and The Tyra Banks Show where she was a guest twice. She appeared alongside TV personality, Regis Philbin in a worldwide commercial for Hummer H2. In 2006, she had a cameo on the box-office hit movie, Casino Royale appearing briefly as Tennis Girl #1. Ambrosio guest-starred on How I Met Your Mother (episode: "The Yips") on November 26, 2007.

Ambrosio loves surfing, seeing bands, drinking caipirinha and eating chocolates, which she admits to indulging in every day. She is very conscious of her figure and works out with her Brazilian trainer doing the Brazilian Butt Lift, which is a mix of samba, capoeira and aerobics.She described her typical week as jetsetting from one country to another for photo shoots and in between she has some phone interviews. She still visits her family in Brazil regularly and calls Erechim, Brazil her favorite place in the world and having traveled the world has not yet convinced her otherwise. On August 24, 2008, Ambrosio and her fiancé, California businessman Jamie Mazur, welcomed their first child, daughter Anja Louise Ambrosio Mazur, in Florianopolis, Brazil. The baby weighed 2.9 kg/6.3lbs.