In New York City, Moose and Camille attend the New York University. Moose is majoring in electrical engineering after promising his father that he would not dance anymore. While touring the campus, he sees a pair of Limited Edition Gun Metal Nike Dunks worn by Luke Katcher. Moose follows the shoes and then stumbles upon a dance battle, where he beats Kid Darkness from the dancing crew House of Samurai. Luke takes him back to his place, an old warehouse converted into a club. Luke shows Moose his dance crew, the House of Pirates, whom he later teams up with to compete in the World Jam dance contest. Jacob informs Luke the warehouse will be put up for auction if the overdue rents are not paid.
Luke meets Natalie at the club and notices her dancing abilities, enlisting her to become part of his crew, but is unaware of Natalie's motives. Moose has to choose between his studies and dance, between a test and a dance competition. He goes to test, but seeing the paper and receiving a message from Luke, he rushes to the competition just in time.
Luke and Natalie become close as the movie progresses. Luke explains his true intentions with his recordings and dance interviews. Natalie is hiding the fact that her brother is Julien, the leader of the House of Samurai, and lies about everything but the love connection between her and Luke.
Natalie faces a hard decision between her love and her family. She confronts Luke and asks what happened with him and Julien. He says that Julien was a member of the House of Pirates, but has a gambling problem and he once wagered against the Pirates and threw the battle, so the Pirates kicked him out. After arguing with Julien, she decides to leave Luke. Julien uses her phone to invite Luke for her birthday party. Luke asks Moose to attend the party with him, but because they have no invitation, they are not permitted to enter. They find a way to get in and Luke and Natalie dance a tango. Julien reveals Natalie's identity and Luke is angry with Natalie. When Luke arrives back at the warehouse, he finds it is foreclosed. Angry at himself for not being a better leader, he exclaims that the House of Pirates is over, and the crew members go their separate ways. Moose and Camille are best friends, but Moose does not see that Camille is in love with him. The two fall out after Moose shows up late to a party.
Moose and Camille make up the streets by dancing to a remix of Fred Astaire and Ginger Rogers. Camille tells Moose that he can never give up dancing as he was born to do it. Moose helps out Luke by bringing the House of Pirates back together, and giving him additional members for his crew including Camille and The MSA Crew from Step Up 2: The Streets. They discover that the former members are now performing with the House of Samurai. They also find out Julien is buying their warehouse, but says if they throw the battle, they can have it back, but they do not take the offer.
Natalie helps Luke and the Pirates win the World Jam with the routine they had practiced. She invites him to come with her to California, which he does by meeting her at the train station and kissing her just as Moose kisses Camille. Before leaving, Luke gives Moose the pair of Limited Edition Gun Metal Nike Dunks and is in charge of the group.Rick Malambri as Luke Katcher, the leader of the House of Pirates.
Sharni Vinson as Natalie, a talented street dancer who is recruited to join the House of Pirates.
Adam G. Sevani as Robert "Moose" Alexander III
Alyson Stoner as Camille Gage, Moose's best friend
Kathy Najimy as Moose's Mom
Joe Slaughter as Julien, the leader of the House of Samurai and Natalie's brother.
Keith Stallworth as Jacob
Kendra Andrews as Anala
Stephen "tWitch" Boss as Jason Hardlerson
Chadd "Madd Chadd" Smith as Vladd
Jonathan "Legacy" Perez as Legz
Martín Lombard as Martin Santiago
Facundo Lombard as Marcos Santiago
Oren "Flearock" Michaeli as Carlos, A person in the House of Pirates
Daniel "Cloud" Campos as Kid Darkness
Shirley Henriquez, as part of the pirates crew
Alberto Collado Aracena, as part of the pirates crew
The MSA Crew
Christopher Scott as Hair
Harry Shum, Jr. as Cable
Janelle Cambridge as Fly
LaJon Dantzler as Smiles
Luis Rosado as Monster
Mari Koda as Jenny Kido
The Lil Pirates
Angelo "Lil Demon" Baligad
Simrin C Player
Jose BoyBoi Tena
Step Up 3D is the film soundtrack album from the motion picture Step Up 3D. The album was released on 27 July 2010. The singles from the album are: "Club Can't Handle Me" by Flo Rida featuring David Guetta, "Already Taken" by Trey Songz, "My Own Step" by Roscoe Dash and T-Pain featuring Fabo and "Irresistible" by Wisin & Yandel.
"Squeeze It (feat. Dada Life & Tiesto)" by DJ Frank E was used in the official advertisement of the film.
The film was released by Touchstone Home Entertainment on Blu-ray 3D and DVD in the United Kingdom on November 29, 2010, in the United States on December 21, 2010, and in the Philippines on January 27, 2011.
Step Up 3D received mixed reviews from critics. Review aggregator Rotten Tomatoes gave it a score of 46% based on 98 amateur reviews. Rotten Tomatoes consensus is: It may not contain believable acting or a memorable plot, but Step Up 3-D delivers solid choreography and stunning visuals. It also holds a score of 45/100 on metacritic signifying mixed or average reviews. The film made $6,657,326 on its first night of release (August 6, 2010), landing second after the buddy cop film The Other Guys, which received $13,124,233. In the weekend box office the movie placed third with $15,812,311 behind the latter and Inception. Its domestic box-office run ended on November 4, 2010, having accumulated $42,400,223 and as of December 5, 2010 it has also earned $116,889,135 in other territories, for a worldwide total of $159,289,358. It has more than doubled the overseas gross of the first film, although it is the least-grossing film of the series in the United States and Canada. On the weekend lasting from October 8–10, 2010 it surpassed Step Up 2: The Streets to become the highest-grossing movie of the franchise worldwide. In terms of estimated attendance, though, it is far behind its predecessors. Besides the United States and Canada, countries where it grossed over $10 million were Germany ($13,869,503), Russia and the CIS ($12,131,409) and the United Kingdom, Ireland and Malta ($11,537,610).