It will be a season of surprises in what promises to be the biggest and most demanding season ever, as 13 celebrities take the ballroom floor on "Dancing with the Stars." Season 7 marks the largest cast assembled to date, the oldest and youngest competitors ever, and includes two Olympic Gold medalists, a Grammy-winning singer, a television legend, an Oscar winner and a Super Bowl champion. Click through this slideshow to meet the 13 celebrities who will be competing in the seventh season of "Dancing with the Stars."Monday, August, 25, 2008, 3:25 PM

Lance Bass has sold over 50 million records as a member of the phenomenally successful pop group *NSYNC. He also executive-produced and starred in a number of film and television projects. In 2002 he successfully trained to be a cosmonaut at Russia's Star City and was certified by both the Russian Space Program and NASA for a mission aboard a Soyuz capsule. Lance has released his memoir, Out of Sync, for Simon Spotlight Entertainment. 2006 U.S. Youth Latin Champ and 2007 World Swing Dance Champ Lacey Schwimmer partners with Lance on Season 7 of "Dancing with the Stars" to make her series debut. ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

Beach volleyball champion Misty May-Treanor and partner Kerri Walsh captured their second Olympic gold medal at the 2008 Beijing Summer Olympics and became the first team ever to repeat as back-to-back champs. The victory also marked their 108th straight match win. Misty and Kerri were distinguished as AVP Team of the Year for four consecutive years (2003 through 2006). Misty was also named Most Valuable Player in 2005 and 2006, Best Offensive Player in 2004, 2005 and 2006, and Best Defensive Player in 2006. For Season 7 of "Dancing with the Stars," she now joins a new teammate, Maksim Chmerkovskiy, who returns for his fifth season. ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

The James Beard Award-winning celebrity chef and author Rocco DiSpirito combines his world-class cooking with a passion for empowering home cooks. A graduate of the Culinary Institute of America, Rocco opened the three-star Union Pacific in New York City in 1997. In 2003 he launched Rocco's for the reality series "The Restaurant." Rocco will next appear on the A&E series "Rocco Gets Real," beginning in October, along with its companion cookbook, Rocco Gets Real: Cook at Home Every Day. For Season 7 of "Dancing with the Stars," he teams with Karina Smirnoff, who returns for her fifth season.ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

Recently retired defensive tackle and Superbowl Champion Warren Sapp played for the Tampa Bay Buccaneers and the Oakland Raiders during his 13-year career. His 96.5 career sacks are the second-highest career total sacks for a defensive tackle in the NFL. Warren was named NFL Defensive Player of the Year in 1999, played in seven consecutive Pro Bowls and won Super Bowl XXXVII with the Tampa Bay Buccaneers in 2003. This fall he will co-host Showtime's "Inside the NFL" and will be a studio analyst and game commentator for the NFL Network. For Season 7 of "Dancing with the Stars," Warren is teamed with Kym Johnson, who returns for her fifth season. ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

Comedian Jeffrey Ross, a.k.a. the "Roastmaster General," has delivered numerous show stopping performances at celebrity roasts honoring the likes of William Shatner, Hugh Hefner, Donald Trump, Pamela Anderson, Bob Saget and Emmitt Smith, inspiring New York Magazine to crown him "The Meanest Man in Comedy." Jeff teams with Edyta Sliwinska, who is the only pro to compete in all seven seasons of "Dancing with the Stars." ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

Actor Ted McGinley's extensive television credits include "Married…with Children," "Hope & Faith," "Happy Days," and recurring roles on the critically-acclaimed series "The West Wing," "Sports Night," "Charlie Lawrence," "Dynasty" and "The Love Boat." He has also starred in such films as "Pearl Harbor," "Daybreak," "Dick," "Major League: Back to the Minors," "Wayne's World 2" and the cult hit "Revenge of the Nerds." Newcomer Inna Brayer will be paired with Ted on Season 7 of "Dancing with the Stars." Inna is the current U.S. Amateur 10 Dance Champion. ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

The winner of six Grammy Awards, Toni Braxton is a Billboard chart-topping singer and actress, selling over 40 million records worldwide. Her U.S. No. 1 hit, "Un-Break My Heart," is the second-biggest single by a female artist in history. She has also appeared in two Disney Broadway shows, "Beauty and the Beast" and "Aida." Season 7 of "Dancing with the Stars" marks her return to the spotlight after a six-month health hiatus. She teams up with Season One champion Alec Mazo, who returns for his fourth season. ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

Actress Cloris Leachman's storied career has been recognized with nine Emmys, a Golden Globe and an Academy Award. She has the distinction of being the only woman to win eight Primetime Emmy Awards and one Daytime Emmy. Cloris has starred in a wide range of theater, television and motion picture projects. In 2008 she has already completed three new film, in the process of writing her memoir and is currently touring the U.S. with her one-woman show, "CLORIS!" She teams with World Latin Champion and Mark's father, Corky Ballas, who makes his series debut on Season 7 of "Dancing with the Stars." ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

Actress, model and reality television star Kim Kardashian shot to stardom after the first airing of her hit E! reality series, "Keeping up with the Kardashians." The series follows the exploits of Kim, her siblings, her mother, Kris, and her stepfather, Olympic Gold Medalist Bruce Jenner. Kardashian recently completed her first feature film, "Disaster Movie," and will also be seen on The N's series "Beyond the Break." For Season 7 of "Dancing with the Stars," she teams up with defending champ Mark Ballas, who returns for his third season.ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

Cody Linley will be the youngest contestant ever to compete on "Dancing with the Stars." He is best known for his role as Jake Ryan on the wildly popular Disney Channel series "Hannah Montana," a role in which he was nominated for a Young Artist Award. He also helped the show garner an Emmy nomination for Outstanding Children's Programming. Cody's film credits include "My Dog Skip," "HOOT," "Miss Congeniality" and "Cheaper By the Dozen." For Season 7, he teams with two-time "Dancing with the Stars" champ Julianne Hough, who returns for her fourth season. ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

A host, actress, entrepreneur and celebrity mom, Brooke Burke has truly done it all. She has graced numerous magazine covers, has her own top-selling swimsuit calendars and is regularly ranked in men's magazines as one of the sexiest women in the world. Recognized worldwide as host of the hit travel series "Wild On!," Brooke has since hosted several high profile network series. Brooke is a mother of four and recently launched her own babystore, BabooshBaby.com. For Season 7 of "Dancing with the Stars," Brooke teams with Derek Hough, who returns for his third season.ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

The winner of two gold medals in the 100m sprint and the 4x100m relay at the 2000 Sydney Summer Olympics, track star Maurice Greene was dubbed the "World's Fastest Man" during his career. In addition to being the former world record holder in the 100m sprint and winning multiple world championships, he also won silver and bronze medals at the 2004 Athens Summer Olympics. He is the current Indoor World Record holder in the 60m at 6.39 seconds. He partners with two-time champion Cheryl Burke for Season 7 of "Dancing with the Stars." Cheryl returns for her sixth season.ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM

As the most famous face in daytime television history, Susan Lucci has held audiences spellbound for years as the sexy, sassy, beautiful "woman you love to hate," Erica Kane, on ABC's "All My Children." In May 1999, all of America stood and cheered when Susan won the Emmy Award for Best Actress. While competing on the show, she will continue her work on "All My Children," and will celebrate her 10,000th episode this November. In addition to her performances on Broadway and in cabarets across the country, Susan is an entrepreneur, having launched successful cosmetic, fashion and jewelry lines on HSN. For Season 7 of "Dancing with the Stars," she teams with Tony Dovolani, who returns for his sixth season. ABC/Craig Sjodin - Friday, August, 29, 2008, 8:29 PM